This dirt cake cup blew my mind with its layers! The silky chocolate mousse pairs perfectly with crunchy cookies & cream streusel while the Dubai-inspired pistachio crème adds an unexpected luxurious twist that makes every spoonful an adventure.
Make the base cookie cups: Preheat oven to 350°F (175°C). Line a jumbo muffin/cupcake pan (8 cups) with parchment rounds for easy removal.
In a large bowl, cream 1 stick butter, 4 oz cream cheese, granulated sugar, and brown sugar on medium-high speed until fluffy and pale, about 2-3 minutes. Beat in eggs and vanilla until well combined.
In a second bowl, whisk together flour, cocoa powder, cornstarch, baking powder, baking soda, and salt. Mix dry ingredients into wet just until combined — overmixing stiffens cookies. Fold in chocolate chips and 6 crushed Oreos.
Divide dough evenly into 8 balls (about 4-5 oz each), press into the muffin pan bottoms and halfway up the sides to create deep cups. Chill dough 45–60 minutes — this prevents spreading and ensures the thick, soft Crumbl-style result.
Bake 14–16 min until edges are set and the center is puffed but still slightly soft. Cool in pan 10 min, then gently lift out and cool completely. Texture tip: Slightly underbaked centers keep the signature fudgy chew.
For chocolate mousse: In a chilled bowl, whip heavy cream with pudding mix until soft peaks form; fold in remaining 6 crushed Oreos for a cookies & cream mousse. Pipe or spoon mousse into cooled cookie cups.
Pistachio crème: Mix powdered sugar, ground pistachios, 3 tbsp milk, almond extract, and optional green coloring until thick but pipeable. Spoon or pipe decorative 'nest' rings atop the mousse.
Top each cup with extra Oreo crumbs and chopped pistachios for crunch. Chill assembled cups 2+ hours before serving so mousse and creme firm up — Crumbl serves theirs chilled for ultimate bite.