Combine dry ingredients in a large bowl; mix well with a whisk.
Using a pastry blender or two knives, cut the cold butter into the dry ingredients until the butter pieces are the size of peas. Store in an air-tight container in the refrigerator until you're ready to make homemade pancakes.
To make pancakes
Combine 1 cup dry pancake mix, 3/4 cup milk, and one large egg together in a bowl. Whisk until thoroughly combined. There will be some clumps due to the pieces of cold butter.
Melt a pat of butter on an electric griddle (these revolutionize breakfasts and cut cooking times in half) or pan set on medium-high heat, and ladle on about a 1/4 cup of pancake batter. When you see bubbles on the top of the pancakes, flip. Wait a few more minutes until the bottom is golden brown.
Repeat until pancake batter is gone. Top with lots of butter, pure maple syrup, and fruit, if you'd like.
Notes
Nutrition facts are based on the pancake mix alone.