For a single block you will need:
Use a quarter inch seam allowance, unless specified otherwise.
- 2 coordinating, 5" charm squares - these will be Fabric A (the largest pieces of the cracker) and Fabric B (the smaller pieces of the cracker);
- 2.5" x WOF strip background fabric
Start by pressing your fabric to remove all creases. Use a little steam or spray starch, and be careful not to distort the fabric. Allow to cool.
Cut one charm square (Fabric A) into two rectangles, 2.5" x 5", then from one of these cut one piece, 2.5" x 4.5", and from the other cut two pieces, 2.5" x 2.25".
Cut the other charm square (Fabric B) into two rectangles, 2.5" x 5". From these cut a total of six rectangles, 2.5" x 1.25".
From your 2.5" background fabric strip, cross-cut 4 pieces, 1" x 2.5". Cross-cut these into two squares each, 1" x 1", for a total of 8 squares. Set the rest of the background fabric aside for now.
Draw a diagonal line, corner to corner, across the back of each of your 1" background squares. This will be your sewing line.
Lay out your pieces as shown, making sure you have the 2.25" Fabric A rectangles oriented the correct way, with the 2.25" edge running left to right.
Sew each end Fabric B piece to its adjacent Fabric A 2.25" piece. Press seams to Fabric A.
Place a square on the corners of the four inner Fabric B pieces, face down, as shown. Pay careful attention to the direction of the sewing lines.
Making sure edges are flush, sew along the sewing lines a smidgen to the seam allowance side of the line (i.e. the outside corner of the square).
Press to set seams. Finger press open, pressing the seams in two of the units (one from each side of the cracker) towards the background fabric, and the other two units to Fabric B. When pressing seams to the background, your corners and edges should all line up:
When pressing to Fabric B, your background should neatly replace the corners of Fabric B. In both cases you should end up with a neat 2.5" x 1.25" rectangle.
When you're sure everything lines up, press seams with your iron - being careful of your fingers with the small pieces. Trim seam allowances to a quarter inch.
Now you will have two pairs, the back of which should look like this:
Sew each pair together, nesting the seams where they meet. You should be able to feel them 'lock' together.
Press seams to one side - whichever side sits nicest. Lay out your pieces again as shown:
Sew the pieces together to finish the cracker, pressing seams to Fabric A.
And from the back:
To finish the block, make sure your cracker is freshly pressed and cooled and measure the length (i.e. the longest side). It should be 12.5".
From your 2.5" background strip, cross-cut cut two rectangles the length of your cracker.
Pinning at the centre, quarter way points and each end, sew a background strip to the top, and one to the bottom of your cracker. Press seams to the background.
Congratulations, you've finished your block!
Note: When complete, block should measure 12.5" x 6.5" (including seam allowance all round). If you want a border all round, rather than just the top and bottom, you will need two more pieces, 6.5" x 2.5", for each end. Depending on how long your 2.5" strip is, you may need more background fabric.