Simple and Delicious Sponge Cake

Step 1
Preheat an oven to 350 degrees F (175 degrees C). Grease an 8-inch cake pan and line with a circle of parchment paper.

Step 2
Beat margarine and sugar with an electric mixer in a large bowl until light and fluffy. Mixture should be noticeably lighter in color. Add eggs, one at a time, allowing each egg to blend into margarine mixture before adding next. Fold in flour until only small lumps remain; pour into the prepared pan.

Step 3
Bake in the preheated oven until a toothpick inserted into the center comes out clean, about 30 minutes. Cool in the pan for 10 minutes before removing to cool completely on a wire rack.