How to Make a Half-Log Cabin Quilt Block with the Creative Grids Log Cabin Trim Tool

This half-log cabin quilt block is made with the Creative Grids Log Cabin Trim Tool, which can also be used for regular log cabin and courthouse steps blocks. Start with a 2 3/4-inch square, then add fabric strips at least 1 3/4 inches wide, trimming after each round with the correct markings on the ruler. Choosing two color groups arranged from dark to light helps the finished block look bold and intentional instead of busy. Once several blocks are complete, they can be arranged in different directions to create traditional or more modern quilt layouts, making this a fun and versatile project for quilters.

The half-log cabin quilt block is a fun, eye-catching variation of the traditional log cabin block. This version is made using the Creative Grids Log Cabin Trim Tool, which is one of those handy quilting rulers that can do more than one thing. According to the Creative Grids instructions, this tool can be used to make a regular log cabin block, courthouse steps, and the half-log cabin block shown here.

I have to admit, it has been over 50 years since my last math class, and part of me thinks this looks more like a quarter-log cabin than a half-log cabin. But I am not about to argue with Creative Grids. They know all the best stuff.

Choosing Your Fabrics

For this block, fabric placement makes a big difference. I chose two different color groups, with each one arranged from dark to light. That contrast is what helps the block pop and gives it visual interest.

Try to avoid using a random mix of prints without a plan. If the fabrics are too jumbled, the final block can look busy and messy instead of intentional. A dark-to-light progression on each side will give the block a cleaner, more striking look.

Starting the Block

Begin with a 2 3/4 inch square for the center. In a traditional log cabin block, this would be the center square. For the half-log cabin layout, it becomes the corner of the block.

From this point on, all fabric strips should be at least 1 3/4 inches wide.

Lay the first strip along one side of the square, then place the second strip along the adjoining side. It does not matter whether you choose the top and right side, top and left side, or bottom and right side. Once the block is rotated, the construction will work the same way.

Round One

After adding the first two strips, locate the square on the Creative Grids ruler marked “Round One.” Place the Round One marking over the center square and trim the excess fabric from the edges. This is similar to trimming a regular log cabin block.

Round Two

Next, add the strips for Round Two. Once the strips are attached, use the Round Two marking on the ruler to trim the block again. Be sure to trim after every round. This step is especially important for keeping the block accurate as it grows.

Round Three

Continue by adding the strips for Round Three. After sewing them in place, use the Round Three square on the ruler to trim the block. Each round builds the design while keeping the shape neat and consistent.

Round Four

Round Four is a little different. For this round, rotate the block and use the Number Two marking on the ruler again. Trim both edges after the strips are added.

Round Five

For Round Five, add the next set of strips and use the Round One marking again to trim the block. The Creative Grids instructions lay out this sequence clearly, so keep them nearby as you work through each round.

Round Six

The final round uses the special marking labeled “Half-Log Cabin” in the upper corner of the ruler. After adding the last strips, align the ruler with that Half-Log Cabin marking and complete the final trim. This creates the finished shape of the block.

Arranging the Finished Blocks

Once you have made several half-log cabin blocks, you can play with different layouts.

You could arrange them together to create the look of a larger log cabin block, with the colors alternating throughout the design. That layout works well and gives a more traditional feel.

Another option is to rotate the blocks so they create a more dynamic, geometric pattern. When grouped, this arrangement gives the quilt top a more interesting and modern look. The beauty of this project is that the blocks can be turned in many different directions, giving you plenty of design possibilities.

Final Thoughts

This half-log-cabin block was a fun project, and the Creative Grids Log Cabin Trim Tool made the process simple and accurate. I also love that the same ruler can be used for regular log cabin blocks and courthouse steps, making it a versatile addition to your quilting tools.

Try experimenting with color placement, block rotation, and layout options to see which design you like best.