In a 1-quart glass jar or a 32-ounce canister or container with a tight-fitting lid, layer the following ingredients one at time into the glass jar in this order: 1½ cups flour, baking powder, salt, ...
A few Christmases ago, our granddaughter started making gifts in jars — jars containing dry ingredients with recipe cards telling how to use the mixes and what other ingredients need to be added.
Some grocery store blueberry muffin mixes are much better than others. So we baked 124 muffins from 13 different mixes to find the very best.