Line a 13x9 inch baking dish with foil, extending up the sides. Grease the foil with about 1 tablespoon of butter or cooking spray. Set aside.

In a large saucepan, melt 0.25 cup unsalted butter over medium heat. Add 10 ounces mini marshmallows and stir constantly until completely smooth. Remove from heat and stir in 0.25 cup unsweetened baking cocoa until combined.

Fold in 5.5 cups Cocoa Krispies cereal and mix until fully combined. Carefully spread the mixture evenly into the bottom of the prepared baking dish, pressing very gently. Set aside to cool slightly.

In a large mixing bowl, beat 0.25 cup softened unsalted butter with 1 cup powdered sugar, 7 ounces marshmallow cream, and 2 teaspoons milk.

Beat for about 3 minutes until the mixture is smooth and fluffy. Carefully spread this marshmallow layer evenly over the chocolate layer in the baking dish. Set aside.

In a large saucepan, melt another 0.25 cup unsalted butter over medium heat. Add another 10 ounces mini marshmallows and stir constantly until melted and smooth. Remove from heat.

Mix in 0.3 ounce sugar-free strawberry gelatin powder until it's fully combined and the mixture is uniformly pink. Fold in 5.5 cups Rice Krispies cereal.

Spread this strawberry mixture gently over the marshmallow layer. Cover the baking dish with plastic wrap and allow the treats to set at room temperature for at least one hour.

Once set, use the foil to lift the entire slab of treats from the pan. Cut into desired pieces (squares or bars).