The most extraordinary magical Strawberry Marshmallow Cake made by tossing 2 cups sliced fresh strawberries with 2 tbsp sugar and 1 tbsp lemon juice macerating 30 minutes and draining then preheating oven to 350°F greasing and lining two 9-inch pans whisking 2 1/2 cups flour 2 tsp baking powder and 1/2 tsp salt beating 1 cup softened butter and 1 3/4 cups sugar 2 to 3 minutes light and fluffy adding 4 room temperature eggs one at a time then 2 tsp vanilla alternating flour with 3/4 cup room temperature sour cream beginning and ending with flour just combined dividing between pans baking 28 to 32 minutes cooling completely then beating 1 cup room temperature butter 3 minutes pale and fluffy adding 2 cups marshmallow fluff beating smooth gradually adding 3 to 4 cups sifted powdered sugar cream vanilla and salt beating 3 minutes incredibly fluffy assembling with marshmallow frosting between layers and generous drained macerated strawberries frosting entire exterior optionally toasting with kitchen torch for dramatic golden toasted marshmallow exterior. A completely perfect vanilla sour cream macerated strawberry marshmallow fluff toasted frosting cake recipe.