Cut a round piece of parchment paper into the bottom of your springform pan. Put some oil or butter on the bottom and sides of the pan.
Melt the butter, for example in the microwave. It takes about 40 seconds.
Whip the eggs and sugar with a hand whisk, so the structure of the eggs is broken down.
Mix the dry ingredients in a separate bowl. Pour them into the egg-sugar mix through a sieve. Mix gently and add as last the melted butter.
Pour the batter into your springform pan and bake at 350 F (175 C) for 13 minutes. You can use a toothpick to test; it should come out dry at the edge and with batter in the middle.
Let the cake cool down, and add powdered sugar on top. Serve with whipped cream.
Notes
If you use a different size pan you might need to adjust the bake time. Perfect to serve with some fresh berries with the cake as well like strawberries or raspberries.