How to Crochet a Heart Granny Square Baby Blanket

Free Crochet Pattern!

If you love granny squares and hearts, you’re going to be just as obsessed with this project as I am! The Granny Sweetheart Baby Blanket combines super cute heart motifs with classic granny stitch to create the ultimate cosy baby blanket — and yes, it's every bit as adorable as it sounds.

Why I Love This Pattern

I had so much fun designing this one. It's the perfect blend of cute and classic, with a lovely flow between the heart squares and the soft granny stitch rows. 

It’s a lovely make for baby showers or as a special handmade gift. You could even switch up the colours to make a more gender-neutral version or one that fits your nursery theme.

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What Yarn I Used

For this blanket, I used Drops Karisma, a super soft and durable DK weight yarn made from 100% superwash wool. The colours I chose were Desert Rose (a gentle dusty pink) and Off White — a warm and timeless combo.

But you can absolutely switch this out for any soft DK yarn. Some great alternatives include:

• Paintbox Yarns Simply DK
• Paintbox Yarns Cotton Mix DK
• Cascade 220 Superwash

Video Tutorial Included

I’ve also included a step-by-step video tutorial, so if you’re more of a visual learner, you can watch along and crochet with me! You’ll find the video linked directly in the pattern — pause, rewind, and rewatch as much as you need.

👉 Watch the video tutorial here

Is This Pattern Beginner Friendly?

Yes! If you’re confident with basic stitches and comfortable working in the round, you’ll find this pattern super doable. The heart motif uses granny stitch with some simple colour changes, and the blanket is worked in straightforward rows once your squares are joined.

If you’ve made granny squares before, you’ll pick this up in no time!

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Granny's Sweetheart Baby Blanket

You’ll Need:

• Yarn: Drops Karisma (DK, 100% wool)
  • MC: approx. 1090 yds (10 balls)
  • CC: approx. 545 yds (4 balls)
• Hooks: 4.00mm and 4.50mm
• Yarn needle, scissors, optional stitch markers

Gauge: 14 sts x 8 rows = 4 inches in granny stitch

Finished Size: 29 x 40 inches approx.

Special Stitches: Granny stitch (3dc into each sp)

Abbreviations (US Terms)

• ch – chain
• sl st – slip stitch
• st – stitch
• sp – space
• hdc – half double crochet (UK: half treble crochet)
• dc – double crochet (UK: treble crochet)
• dc2tog – double crochet 2 together
• MC – main colour
• CC – contrast colour
• blo – back loop only
• sk – skip

Pattern Notes:

• Read pattern carefully all the way through before starting.
• Although gauge is not essential for this pattern, yarn quantities may vary greatly if you do not meet gauge.
• One motif is crocheted first then subsequent motifs are crocheted and joined as you go.
• Ch3 at start of round counts as a dc throughout.
• Ch1 at start of round does not count as a stitch.
• When changing colour, work the final yarn over of the last stitch in the current colour using the new colour, then continue crocheting with the new colour.
• Carry unused yarn loosely across your work, crocheting over this yarn as you go.
• In round 4 crochet over any long floats.

Heart Motif

With CC ch4, join with sl st to form ring.

Round 1: ch3, 2dc into ring, [ch2, 3dc into ring] x3, ch2, join with sl st to top ch3. (12dc, 4ch2 sp)

Round 2: sl st in next 2 st's and in corner sp, ch3, 2dc, ch2, 3dc in same sp, [3dc, ch2, 3dc in next sp] x3, join with sl st to top ch3. (24dc, 4ch2 sp)

Round 3: sl st in next 2 st's and in corner sp, [ch3, 2dc, ch2, 3dc] in same sp, 3dc in next sp, with MC, [3dc, ch2, 3dc] in next corner sp, with CC, 3dc in next sp, with MC, [3dc, ch2, 3dc] in next corner sp, with CC 3dc in next sp, [3dc, ch2, 3dc] in next corner sp, with MC 3dc in next sp, with CC join with sl st to top ch3. (36dc, 4ch2 sp)

Round 4 with CC sl st in next 2 st's and in corner sp (carrying MC across), fasten off CC. Draw MC through corner sp to front, [ch3, 2dc, ch2, 3dc] in same sp. [3dc] in each sp across sides and in each corner [3dc, ch2, 3dc] join with sl st to top ch 3. (48dc, 4ch2 sp)

Round 5 With MC only repeat round 4.    (60dc, 4ch2 sp)

Heart Motif Chart

Start here...

Blanket Panel (make 2)

• With 4.00 mm hook make 1 heart motif

• Make a 2nd motif only up to round 4 and continue as follows -

Round 5: With MC, sl st in next 2 sts and into corner sp. [ch3, 2dc, ch1, sl st to top right corner of previous granny square, ch1, 3dc] in same sp. [sl st to next sp on previous granny square, 3dc in next sp] across side, sl st to next sp on previous granny square once more, [3dc, ch1, sl st to bottom right corner sp on previous granny square, ch1, 3dc] at next corner sp. [3dc] in each side sp and [3dc, ch2, 3dc] in each remaining corner sp, join with sl st to top ch3. ((60dc, 4ch2 sp) 

• Repeat this process until you have a total of 6 joined granny squares.

• Proceed with body of panel as follows.

Row 1: With 4.50 mm hook and MC join to top right corner of granny square strip, ch3, dc in same sp, 3dc in each sp across top of granny squares, at each join [dc in right corner sp, dc2tog over right and left corner sp, dc in left. corner sp], ending with 2dc in last corner sp. Turn

Row 2: Ch3, [3dc] in next and each sp across, ending with dc in top ch3, turn.

Row 3: Ch3, dc in next sp. [3dc] in each sp across, ending with dc in last sp and dc in top ch3, turn.

Repeat last 2 rows until there is a total of 31 rows of granny stitch,  Fasten off.   Repeat this process for a 2nd panel.

Joining Panels

Position both panels together with right sides facing upwards and a row of granny squares at the top and bottom.

Sew panels together using mattress stitch (see video).

Border Prep

With 4.50 mm hook, working along sides of granny stitch only.

With MC, joining in corner of granny square where granny stitch rows begin.

Sl st evenly across sides of granny stitch rows (approx. 2 sts in the side of each row).

End with sl st into corner sp of granny square where granny stitch finishes.

Repeat on other side of blanket.

Border & Spider Stitch Edging

Round 1: With 4.00 mm hook and CC and working in blo, join with hdc in any st across side, [hdc in blo] in each st across sides and [3hdc] in each corner sp, join with sl st to 1st hdc.

Round 2: Ch1, [hdc in blo] across sides and [3hdc] in each corner st, join with sl st to 1 hdc.

Round 3: Ch1, [sc, ch2, sc in same st, sk1] around, join with sl st to 1 sc. Fasten off, block and weave in ends. 

This blanket is a joy to make and the finished result is so sweet and special — perfect for gifting, baby showers, or just snuggling at home. I hope you enjoy every stitch!

More blanket patterns for you to enjoy...

Happy hooking!

Catherine x

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