crumb topping – In a small bowl or the food processor, add the Oreo cookies and pulse into large crumbs. Add the softened butter and mix gently with a fork or your hands to make pea-sized pieces stick together. Scoop out 2 tablespoons of the mixture into a small bowl and set aside. Pour strawberry jello powder over the remaining crumbs and continue pinching the pieces together. Add more softened butter if needed for mixture to stick to the cake.