In a large bowl, sift together the flour, baking powder, salt, and sugar.
Transfer the dry-mix to a quart-sized zip bag, seal, and store for up to 6 months.
To Use DIY Gluten-Free Pancake Mix
Pour all the dry ingredients into a medium-size bowl. Add the milk, egg and butter, if using. Mix well to combine. Pour ¼ cup of pancake batter onto the pan or griddle over medium heat. Wait until bubbles form to flip.
Serve with fruit, syrup, or whatever else you prefer.
Notes
Use the right baking powder: Since pancake batter naturally has a mild, neutral flavor, it's important to use aluminum-free baking powder. The metallic flavor will ruin the taste, especially in fluffy pancake recipes that call for 2 or more teaspoons. Trust me on this one.