• Grease and flour muffin tins.
• Mix flour, baking powder, baking soda, and salt; set aside.
• Pour the 1 c. sugar into a large bowl, then add the melted butter.
• Add eggs, vanilla, and sour cream, and mix well.
• Stir in the flour mixture and mix until combined.
• If you're adding in a mix-in such as chocolate chips or blueberries, fold them in to the batter.
• Scoop batter into muffin tins.

Cinnamon & Sugar option

• Combine the 1/2 c. sugar and 2 tsp. cinnamon and set aside.
• Place a small amount of batter in tin, add desired amount of the cinnamon & sugar mixture (I use about a teaspoon or so) then add another small amount of the batter on top. Sprinkle lightly with the cinnamon mixture.
• Bake at 350° for 15 minutes, or until done, and a toothpick comes out clean.