1
In a bowl, whisk together flour, baking powder, and salt.
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2
In a separate bowl, combine the brown sugar, granulated sugar, sour cream, peanut butter, whole milk, vegetable oil, egg, and vanilla extract, whisking until the mixture is smooth.
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3
Line your cupcake pan with paper liners. Spoon the batter into the liners, filling each about 2/3 full. Bake for about 20-25 minutes.
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4
Once smooth and fluffy, spread the frosting onto the cooled cupcakes. Enjoy your cupcakes!
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