In a large mixing bowl, use an electric mixer on medium speed to beat cream cheese and butter together until smooth and creamy, about 2 minutes.

Gradually add confectioners' sugar, baking cocoa, and milk to the cream cheese mixture, mixing on low speed until incorporated, then increase to medium and blend for 1-2 minutes until fully combined.

Add brown sugar and vanilla extract to the mix, blending on low for another 1-2 minutes until dissolved.

Adjust thickness by adding milk one tablespoon at a time until desired consistency is reached.

Sprinkle M&M's minis or dark chocolate chips on top and serve immediately with graham crackers, pretzels, or fresh fruit.