Let me guess. You saw this stunning butterfly cardigan and immediately thought, "There’s no way I can make that." I get it. Those intricate wing cells, the gradient of blues, the realistic vein detailing. It looks like something that belongs in a gallery, not on your crochet hook.
But here’s the truth. This pattern breaks down into surprisingly manageable pieces. The body is a simple open-front vest worked entirely in single crochet. The wings are flat pieces with basic shaping. And those gorgeous vein lines? They’re added after everything is done using surface slip stitch, which is essentially just pulling yarn through fabric in a straight line.
If you can work single crochet, increase, decrease, and follow a color chart, you can absolutely make this. Beginners with some patience will succeed. Intermediate crocheters will find it a satisfying challenge. And advanced makers will appreciate the clever construction. Let’s walk through it together.
About This Butterfly Cardigan Crochet Pattern
This Blue Morpho Butterfly Cardigan is a wearable art piece designed for toddlers sized 2T to 3T. The finished garment features a simple open-front vest body with dramatic dimensional wing appliques that extend outward from the front panels. When a child wears it, they transform into a butterfly.
The cardigan has no closures and is worn open, making it easy for little ones to put on and take off. The wings are worked separately using a combination of shell stitches, raised treble clusters, and surface slip stitch veining to replicate the layered cell structure of a real Blue Morpho butterfly wing. Beaded accent points run along the center front edges for extra sparkle.
Finished Measurements:
Skill Level: Intermediate to Advanced
Time Estimate: 25 to 35 hours for the complete garment
Materials Needed for This Crochet Tutorial
Gather everything before you start. Having all your supplies ready makes the process smoother and more enjoyable.
Yarn (Worsted Weight):
Use 100% acrylic or an acrylic-cotton blend for best results. Avoid fuzzy or mohair yarns because the wing cell detail and surface veining require clear stitch visibility.
Recommended Yarn Options:
Hook: US Size J / 6.0 mm
Notions:
Gauge for This Pattern
Getting gauge right is mandatory for this garment. The body must fit a toddler chest of 22 inches.
In single crochet with Color A and a 6.0 mm hook:
16 sc x 18 rows = 4 inches (10 cm) square, blocked
In shell pattern (used in wings):
One 5-dc shell + 1 sc = 1.5 inches (3.8 cm) wide
Shell row height = 0.75 inches (1.9 cm)
Work a gauge swatch of at least 6 x 6 inches. Wash it, block it, and measure it before starting the actual project. This step will save you from heartbreak later.
Abbreviations and Stitch Definitions
Understanding these terms is essential before diving into the step by step instructions. I’ll define each one with a plain-English explanation.
Special Stitches for the Wing Construction
These techniques create the dimensional texture that makes the wings look so realistic.
5-dc Shell: Work 5 double crochet stitches all into the same stitch or space. This creates a fan-shaped cluster that forms the body of each wing cell.
3-dc Cluster: Yarn over, insert hook into stitch, yarn over, pull up loop, yarn over, pull through 2 loops (you now have 2 loops on hook). Repeat this twice more in the same stitch (4 loops on hook). Yarn over, pull through all 4 loops. This creates a puffy raised texture.
FPtr (Front Post Treble Crochet): Yarn over twice, insert hook from front to back to front around the post of the designated stitch in the row below. Yarn over, pull up loop (4 loops on hook). Yarn over, pull through 2 loops, three times. This stitch sits in front of the fabric and creates raised vein lines.
Surface Slip Stitch: With the right side facing, make a slip knot with Color E (black). Insert your hook through the fabric at the starting point. Pull up a loop. Continue inserting the hook through the fabric at even intervals along the vein path, pulling the working yarn through both the fabric and the loop on your hook. This creates a raised cord on the surface. This is how all the wing vein lines are added after blocking.
Scallop Edge: [Slip stitch in next stitch, chain 1, 3 dc in next stitch, chain 1, slip stitch in next stitch] repeat across. This produces the decorative scalloped border on the neckline and hem.
Pattern Notes Before You Begin
1. The cardigan has four main sections: Back Body Panel, Left Front Body Panel, Right Front Body Panel, and two Wings (Left and Right). The body is seamed at the shoulders only. The wings are seamed to the outer edge of each front body panel.
2. The body uses Color A throughout. Wing colorwork uses the intarsia method. Carry unused colors loosely across the back or cut and rejoin as needed. Never carry Color E (black) across the back. Always cut and rejoin.
3. The sides are left open (no side seams). This open-side construction allows the wings to extend outward freely.
4. Turning chains: Chain 1 does not count as a stitch. Chain 3 counts as 1 dc.
5. Wing veining is added entirely with surface slip stitch after all pieces are blocked.
6. Beads are sewn on last, after all blocking and veining are complete.
How to Crochet the Back Body Panel
The back is one rectangle with a shaped neckline at the top.
Foundation: With Color A and 6.0 mm hook, ch 47.
Row 1 (WS): Sc in 2nd ch from hook and in each ch across. Turn. (46 sc)
Rows 2 through 52: Ch 1, sc in each st across. Turn. (46 sc each row)
At the end of Row 52, the piece should measure approximately 11.5 inches (29 cm) tall and 11.5 inches (29 cm) wide.
Back Neckline Shaping
Mark the center 16 stitches of the 46-stitch row. These are stitches 16 through 31.
Left Shoulder:
Row 53 (RS): Ch 1, sc in first 15 sts. Turn, leaving remaining sts unworked. (15 sc)
Row 54: Ch 1, sc2tog, sc in each st to end. Turn. (14 sc)
Row 55: Ch 1, sc in each st to last 2 sts, sc2tog. Turn. (13 sc)
Row 56: Ch 1, sc2tog, sc in each st to end. Turn. (12 sc)
Row 57: Ch 1, sc in each st across. Turn. (12 sc)
Fasten off. This is the left shoulder strap, 12 sts wide.
Right Shoulder:
With RS facing, skip center 16 sts and rejoin Color A to st 32.
Row 53 (RS): Ch 1, sc in each st to end. Turn. (15 sc)
Row 54: Ch 1, sc in each st to last 2 sts, sc2tog. Turn. (14 sc)
Row 55: Ch 1, sc2tog, sc in each st to end. Turn. (13 sc)
Row 56: Ch 1, sc in each st to last 2 sts, sc2tog. Turn. (12 sc)
Row 57: Ch 1, sc in each st across. Turn. (12 sc)
Fasten off. This is the right shoulder strap, 12 sts wide.
How to Crochet the Front Body Panels (Make 2)
Each front panel is half the width of the back. Both are worked identically to Row 52, then the neckline shaping differs by side.
Foundation: With Color A and 6.0 mm hook, ch 24.
Row 1 (WS): Sc in 2nd ch from hook and in each ch across. Turn. (23 sc)
Rows 2 through 52: Ch 1, sc in each st across. Turn. (23 sc each row)
Each front panel should measure approximately 5.75 inches wide by 11.5 inches tall after Row 52.
Left Front Neckline Shaping
Row 53 (RS): Ch 1, sc in first 12 sts. Turn, leaving remaining 11 sts unworked for neckline. (12 sc)
Rows 54 through 57: Ch 1, sc in each st across. Turn. (12 sc each row)
Fasten off.
Right Front Neckline Shaping
With RS facing, rejoin Color A to the right front panel.
Row 53 (RS): Ch 1, sc in first 12 sts. Turn, leaving remaining 11 sts unworked for neckline. (12 sc)
Rows 54 through 57: Ch 1, sc in each st across. Turn. (12 sc each row)
Fasten off.
Body Assembly
Seam shoulders: With tapestry needle and Color A, seam each front shoulder strap to the corresponding back shoulder strap using mattress stitch or whip stitch. Each seam joins 12 sts of front to 12 sts of back.
Do not seam the sides. The side edges remain open.
Body Neckline and Front Edge Finishing
With RS facing and Color A, join yarn at the lower right front edge. Work sc evenly up the right front edge, across the back neckline, and down the left front edge. Place approximately 1 sc per row along vertical edges and 1 sc per stitch across the back neck.
Approximate count: 52 sc up right front, 16 sc across back neck gap, 52 sc down left front. Total approximately 120 sc. Work 3 sc in each corner stitch to turn neatly around neckline corners.
Row 2 of edging (scallop): Work scallop edge across entire front opening and neck: [Sl st in next st, ch 1, 3 dc in next st, ch 1, sl st in next st] repeat across. Fasten off.
Body Hem Finishing
Back hem: Join Color A at lower right corner of back, ch 1, sc across 46 sts. Work scallop edge row. Fasten off.
Each front hem: Join Color A at lower corner of front panel, ch 1, sc across 23 sts. Work scallop edge row. Fasten off.
Wing Construction Overview
Each wing represents both the upper wing (larger, wider) and lower wing (smaller, more pointed) of the butterfly, joined at the body center axis. The two wings are mirror images.
Wing Colorwork Arrangement
Looking at the wing flat on a surface:
Use the intarsia method for color changes. Each color section uses a separate bobbin of yarn. Drop the old color and pick up the new from below to twist yarns and avoid holes.
Upper Wing Lobe, Stage 1
Foundation: With Color A and 6.0 mm hook, ch 3.
Row 1 (WS): Sc in 2nd ch from hook, sc in next ch. Turn. (2 sc)
Row 2 (RS): Ch 1, inc in first st, inc in last st. Turn. (4 sc)
Row 3: Ch 1, inc in first st, sc to last st, inc in last st. Turn. (6 sc)
Row 4: Ch 1, inc in first st, sc to last st, inc in last st. Turn. (8 sc)
Row 5: Ch 1, inc in first st, sc to last st, inc in last st. Turn. (10 sc)
Row 6: Ch 1, inc in first st, sc to last st, inc in last st. Turn. (12 sc)
Row 7: Ch 1, inc in first st, sc to last st, inc in last st. Turn. (14 sc)
Row 8: Ch 1, inc in first st, sc to last st, inc in last st. Turn. (16 sc)
Row 9: Ch 1, inc in first st, sc to last st, inc in last st. Turn. (18 sc)
Row 10: Ch 1, inc in first st, sc to last st, inc in last st. Turn. (20 sc)
All stitches in Rows 2 through 10 are worked in Color A.
Now begin colorwork. The color distribution is noted in brackets showing color and stitch counts.
Row 11 (RS): Ch 1, inc in first st (A: 1 st inc), sc 16 in established colors [A: 4 sts, B: 12 sts], inc in last st (B: 1 inc). Turn. (22 sc) Distribution: A: 5, B: 17.
Row 12: Ch 1, inc in first st (B), sc in each st [B: 16, A: 5], inc in last st (A). Turn. (24 sc) Distribution: A: 6, B: 18.
Continue following the pattern through Row 36, which is the narrowest point between upper and lower wing lobes (the notch). The piece should be approximately 6.25 inches wide at Row 36.
Lower Wing Lobe, Stage 2
The lower lobe fans back outward before tapering to the bottom point. Continue from Row 37 through Row 72, following the decrease pattern until you end with a single stitch at the lower wing tip.
Checkpoint: The finished wing (before border and surface work) should measure approximately 10 inches (25.5 cm) from top axis corner to bottom point, and approximately 7.75 inches (19.7 cm) at its widest point in the upper lobe.
Wing Border
With RS facing and Color E (black), join yarn at the top inner corner of the wing. Work sc evenly around the entire outer perimeter, placing 1 sc per row along straight edges, 3 sc at each outer corner, and sc2tog at each inward notch point. Do not border the inner axis edge as this will be seamed to the cardigan.
After one round of sc border, work one more round of sl st in Color E for a firm, defined black outline. Fasten off.
Make the second wing as a mirror image.
Finishing Your Butterfly Cardigan
Blocking
Block all pieces before assembly. Wet block or steam block gently. Pin the wings flat, stretching slightly to open the wing shape. Allow to dry completely.
Adding Wing Veins
Using Color E and the surface slip stitch technique, add vein lines following the natural cell structure of a butterfly wing. Start at the body axis and work outward. Add secondary veins in Color B within the cell bodies for extra dimension.
Attaching Wings
Pin each wing to the outer edge of its corresponding front body panel, with the inner axis edge of the wing aligned to the outer edge of the front panel. The wings should extend outward. Whip stitch securely in place.
Adding Beads
Thread beading needle with thread matching Color A. Sew seed beads along the center front edges in two vertical columns, and scatter additional beads near the wing attachment points. Knot securely at each bead.
Tips for Success with This Beginner Friendly Construction
Even though this is labeled intermediate to advanced, the individual techniques are accessible. Here’s how to approach it:
Start with the body. It’s entirely single crochet, which builds confidence before tackling the wings.
Practice intarsia. If you’ve never done colorwork where colors are worked in blocks (not carried across), try a small swatch first. The key is twisting the yarns at each color change to prevent holes.
Take your time with wing shaping. The increases and decreases follow a logical pattern. Use stitch markers to track your axis edge versus your outer edge.
Don’t skip blocking. Blocking transforms the wings from floppy fabric into crisp, defined shapes ready for surface embellishment.
Add veins last. This is actually the fun part. Once everything is blocked, the surface slip stitch goes quickly and dramatically transforms the look.
Caring for Your Finished Cardigan
Hand wash in cool water with mild detergent. Lay flat to dry, reshaping the wings. Do not hang, as this can stretch the fabric. Store flat or gently folded with tissue paper supporting the wings.
I hope this crochet pattern helps you create something truly magical for a special little one in your life. This butterfly cardigan is the kind of project that becomes an heirloom, photographed at every birthday party and passed down through families.
If you make this Blue Morpho Butterfly Cardigan, I would absolutely love to see your version. Save this pattern to your Pinterest boards so you can find it when you’re ready to start. And please leave a comment below to share your progress or ask any questions. Happy crocheting!
