Quilt Along

How to Make A Greek Cross Quilt Block

Looking for a big quilt block where you can really show off that special fabric? Well this might just be the one for you. This tutorial will show you how to make a Greek cross quilt block that is 18 1/2″ square.

Sometimes these big blocks are really fun to do. They make a big impact. In addition, because of the size, you only need to make one and presto…you have a mini quilt.

This Greek cross is an ideal block to make in a large size. It’s got a great center that measures 6″ so you can show off your fussy cutting skills.

For those of you who are participating in the 2021 “Stars of the Prairie” mystery quilt, this is the third block. You will probably be happy to know that we will only be making one of them this month. In fact, here’s a little clue for you…we will be making one block each month for the rest of the challenge.

If you are here for the quilt block tutorial, but not for the mystery quilt, then scroll down a little bit for the instructions.

*Download the Greek Cross Quilt Block Pattern Here*

March Mystery Quilt Info

Please read all instructions carefully before beginning.

We will be making one block this month. Use a scant 1/4″ seam allowance throughout.

Supplies Needed

Along with the fabric, you will need some general quilting supplies.

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How to Make a Greek Cross Quilt Block (18 1/2″)

Fabric Needed for 1 Block:

  • Background Fabric: ¼ yard
  • Fabric A: Fat quarter
  • Fabric B: 1/8 yard
  • Fabric C: 6 1/2” square

Cutting Instructions for 1 Block:

Background Fabric:
  • 2 squares cut 7 ¼ inches by 7 ¼ inches
Fabric A:
  • 2 squares cut 7 ¼ inches by 7 ¼ inches
  • 4 rectangles cut 6 ½ inches by 3 ½ inches
Fabric B:
  • 4 rectangles cut 6 ½ inches by 3 ½ inches
Fabric C:
  • 1 square cut 6 ½ inches by 6 ½ inches

Video Tutorial

Block Assembly:

To begin, make the half square triangles.

To make them for the corner units you will need the squares of the background fabric and fabric A that are 7 ¼ inches. Pair one square of background fabric with one square of fabric A.

First, draw a diagonal line on the back (wrong) side of the lighter fabric. This will be your sewing guide.

Second, line up the squares of background fabric and fabric A with front (right) sides facing each other.

Using a scant ¼ inch seam allowance, sew along both sides of the drawn diagonal line.

Cut down the center, along the drawn line. You will end up with two blocks that need to be pressed to the dark side.

Trim the blocks down so they measure 6 ½ inches by 6 ½ inches. Repeat with the other two squares. You will have a total of 4 half square triangles.

Next make the center outside blocks. To make them you will need the rectangles from fabric A and B.

Line up one rectangle from fabric A and one from fabric B on top of each other with right sides (front) facing each other. Using the ¼ seam allowance, sew down one long side. Press open. These units should measure 6 ½ inches square.

With the fabric C square as the center, lay out the units as shown. Sew the block together. It should measure 18 ½ inches when finished.

This would be a great block for some fussy cutting. You could show off a nice design in the center square.

My March tester block.

If You Are Participating in the 2021 Stars of the Prairie Mystery Quilt:

You just need to make 1 of these blocks.


Feel free to join in the mystery quilt fun. You can find all of the details in this article.

In addition, I have this FB group for people who are participating. It’s a fun place to see what other people are doing for their blocks.

What we’ve done so far:

Show off your progress on social media! Make sure to use the hashtag #createwithclaudiaqal if you post any pictures!

*This mystery quilt along is for entertainment purposes only. Therefore, there are no prizes or giveaways.* Best efforts have been made to ensure that the instructions are correct, however sometime errors occur. If you have any questions, please contact us at claudia{at}createwithclaudia{dot}com*

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