Preheat the oven to 350°F. In a large mixing bowl, combine flour, cocoa powder, baking powder, and salt. In another bowl, whisk sugar, melted butter, eggs, vanilla extract, and milk until smooth. Gradually add dry ingredients to wet, stirring until just combined.

Pour the batter into a greased mini muffin tin, filling each cup about two-thirds full. Ensure even distribution for uniform baking.

Place the muffin tin in the oven and bake for 12-15 minutes, or until a toothpick inserted into the center comes out mostly clean. Let them cool in the pan for 5 minutes before transferring to a wire rack.

Once completely cooled, use a piping bag to swirl pink icing onto each brownie bite. Decorate with Valentine-themed sprinkles to add a festive touch.

Arrange the decorated brownie bites on a platter or dessert stand. These are perfect for parties or as a delightful gift.

Store in an airtight container at room temperature for up to three days. For longer storage, refrigerate for up to a week.