For the crust:
– 2 tablespoons unsalted butter
– 20 marshmallows
– ½ teaspoon vanilla extract
– 3 cups Rice Krispies cereal
For the filling:
– 3 tablespoons unsalted butter
– 1 teaspoon pumpkin pie spice
– 30 marshmallows
– orange food coloring , or a combination of red and yellow to create orange
– 4 cups Rice Krispies cereal
– tub of white frosting
– decorative fall sprinkles (optional)