For most pancake mixes, the directions use 1 cup of mix and then give required ingredients to make the batter (water, milk, eggs, oil, etc). In this case, double the recipe so you are using 2 cups of pancake mix and double the amount of ingredients needed to make the batter. Add one egg, maple syrup, cinnamon, and vanilla and proceed…
Find it online: https://holleygrainger.com/pancake-muffins-recipe/