“fast it fairly out. Our cake’s dough on both sides”
Metaphor
Act 1,
Scene 1
Lines 106-111
Gremio
To fast means to go without food. Gremio’s saying that women’s love is not so important that he and Hortensio can’t just go without it until the problem of Katherina gets resolved. He follows up the “fasting” metaphor with a food proverb. “My cake is dough” means your project has failed (your cake didn’t bake). Their cake is dough “on both sides” — that is, neither one of them has succeeded in being able to woo Bianca.