To prepare a strawberry refrigerator cake recipe, first you need to prepare the ingredients. First, you'll need the following ingredients: 1 cup granulated sugar 2 tablespoons margarine 1 teaspoon vanilla 2 cups chilled whipping cream Instructions: Sift the flour, cocoa, baking powder, salt, and baking soda. Add the dry ingredients to the wet ingredients and mix until just combined. Pour the batter into the prepared cake pan and bake in the oven at 350 degrees F for 35 to 40 minutes. Let the cake cool before cutting into squares.