A genuinely light, fluffy sponge cake made from just three ingredients and cooked in the microwave in eight minutes, proof that the simplest things are often the most satisfying.
About This Recipe
Three ingredient cakes demonstrate something important about baking: the fundamentals of a good sponge are butter, sugar, and eggs. Flour is almost optional. A properly beaten combination of butter, sugar, and eggs contains enough air, enough structure from the egg proteins, and enough sweetness to produce something genuinely sponge-like even without additional leavening or flour.
This recipe uses just a small amount of flour for additional structure, making it technically a four-ingredient cake if you count the pinch of salt, but the spirit is simplicity. The technique requires proper beating of the butter and sugar until the mixture is genuinely pale and fluffy, which takes about three minutes with a hand mixer or five minutes by hand. This beating is where all the air goes in, and the air is what makes the sponge light.
The microwave cooks the sponge from the outside in, producing a very slightly different texture from a conventionally baked version, more uniformly tender without the slight crust that an oven produces. Topped with jam and a dusting of icing sugar, or simply eaten warm with cream, it is a genuinely excellent quick cake that surprises people who expect something from so few ingredients to be merely adequate.
History and Origins
Three-ingredient and minimal-ingredient cakes have a long history in home baking, emerging from traditions of frugality where bakers worked with whatever was available. The classic French Génoise sponge uses only eggs, sugar, and flour with no added fat, while Spanish bizcocho uses similar minimal ingredients. The microwave version adapts this tradition for modern convenience.
Why It Is Fast To Make
Three main ingredients. Microwave cooking eliminates preheating. Eight minutes total.
3 Ingredient Microwave Sponge Cake
Course: Cake4
servings5
minutes5
minutes1200
kcalIngredients
•t3 large eggs
•t75g white sugar
•t75g self-raising flour
•tPinch of salt
•tJam and icing sugar to serve
Directions
- Whisk eggs and sugar together with an electric mixer for 3 minutes until very pale, thick and tripled in volume.
- Gently fold in flour and salt in three additions without losing the air.
- Pour into a greased microwave-safe round dish.
- Microwave on medium power for 4 to 5 minutes until just set.
- Cool for 3 minutes. Turn out. Dust with icing sugar and serve with jam.
Notes
- The thorough whisking of eggs and sugar is the entire leavening system. Do not rush this step.
Fold the flour in very gently using a large metal spoon. Rough folding collapses the air and produces a flat, dense result.
Cook on medium rather than full power for a more even result.
This cake is delicate. Handle gently when turning out.
Make Ahead Tips
Eat on the day it is made. This cake stales quickly due to the lack of fat to retain moisture.
Storage and Serving
Best eaten within a few hours of making. Store loosely covered at room temperature. Does not freeze well. Serve with jam, cream, or fresh fruit.
Variations and Substitutions
Add the zest of a lemon to the batter. Replace a tablespoon of flour with cocoa powder for a light chocolate version. Fill with whipped cream and fresh strawberries. Add a teaspoon of vanilla extract to the egg and sugar mixture.
