→ Brownie Layer
01 - 1 box (18 oz) chocolate brownie mix plus eggs, vegetable oil, and water as required on package
02 - Butter or nonstick cooking spray for greasing pan
→ Pistachio Pudding Layer
03 - 2 boxes (3.4 oz each) instant pistachio pudding mix
04 - 4 cups cold whole milk
05 - Green food coloring, optional
→ Whipped Cream Layer
06 - 2 cups heavy whipping cream
07 - 4 tablespoons powdered sugar
08 - 1 teaspoon pure vanilla extract
→ Garnish
09 - Green sprinkles, chocolate shavings, or chopped pistachios, optional