STEP ONE: COLOR DOUGH
Remove the cookie dough from the refrigerator and let it come to room temperature. Break it up and place in a large bowl; beat in eggs with an electric mixer. Divide the dough equally into five small bowls; add food coloring and stir to combine.
STEP TWO: PREPARE DOUGH
Spoon the dough into the muffin pan to make ten cupcakes total (two cupcakes of each color). Bake the cupcakes; remove and cool completely. While they’re cooling, beat cream, sugar and vanilla together using an electric mixer. Once the cupcakes have cooled, use your hands to crumble them, using a separate bowl for each color.
STEP THREE: MAKE PARFAIT LAYERS
Fill a resealable plastic bag with the cream mixture. Sprinkle one color of cookie crumbles into 12 glass parfait cups; pipe cream on top. Repeat the process until all five colors have been used.