Strawberry Shortcake Rice Krispie Treats - In a large microwave safe bowl, melt 2 1/4 cup marshmallows and 1 1/2 tbsp butter together. Stir in 2 1/2 cup Rice Krispie Cereal and 1 cup angel food cake squares. Press into a lightly greased 8 X 8 inch square pan. In a stand mix, beat 1 cup whipping cream, 3 tbsp sugar, and 1 tsp vanilla just until stiff peaks form. Cut Rice Krispies into squares and top individual treats with a heaping spoonful of whip cream and fresh strawberries.