Brownie Bites with Fluffy Peanut Butter Frosting

From:  www.the-girl-who-ate-everything.com

Brownie Bites

1 boxed brownie mix (I think chocolate cupcakes would be yummy too)

1 cup Reeses Peanut Butter chips (optional)

Peanut Butter Frosting

1/2 cup butter, softened

1 cup creamy peanut butter

3 tablespoons milk, or as needed

2 cups confectioners' sugar

1. Make brownie mix according to package directions. Add peanut butter chips if desired. 
2. Pour into paper lined mini muffin pans filling each cup about 3/4 full. 
3. Bake 14-18 minutes at 350 degrees or until toothpick comes out clean. Cool.

• Place the butter and peanut butter into a medium bowl, and beat with an electric mixer. 
• Gradually mix in the sugar, and when it starts to get thick, incorporate milk one tablespoon at a time until all of the sugar is mixed in and the frosting is thick and spreadable. 
• Beat for at least 3 minutes for it to get good and fluffy. Frost brownie bites with frosting.