Also definitely cream your sugar and butter together like Ellie suggested also what kind of flour are you using? A and if it’s a sponge cake I don’t use butter in mine..i beat my egg yolks and sugar together until very pale and whisk my whites separately and fold that all into my dry but every recipe is different 😁 I also use a combination of all purpose flour and corn starch but you could use cake flour too
Amanda Bowman