Step 1

Preheat oven to 350 degrees F. Line a 9x9-inch square baking pan with parchment paper or lightly grease.

Step 2

In a medium mixing bowl, whisk together flour, cocoa powder, baking soda, and 1/4 teaspoon salt.

Step 3

In another bowl, whisk together melted butter and granulated sugar. Whisk in eggs, milk, and 1 teaspoon vanilla until well combined. Gently whisk in flour mixture until just combined.

Step 4

Pour batter into prepared baking pan and spread to form an even layer.

Step 5

Bake brownies at 350 degrees F for about 20-25 minutes or until a toothpick inserted in middle comes out clean. Cool completely.

Step 6

When brownies are cool, start frosting. In a large mixing bowl, beat together softened butter and powdered sugar with an electric mixer on medium speed. Beat in 1 teaspoon of vanilla and dash of salt. Add a little milk at a time until desired consistency. Continue beating until smooth and creamy.

Step 7

Spread frosting over cooled brownies. Spoon sprinkles on top right away and gently press into frosting.