le beurre et l'argent du beurre

• le beurre, l'argent du beurre et le cul de la crémière
• le beurre, l'argent du beurre et le sourire de la crémière

Literally "the butter and the money from [selling] the butter"

• IPA^(key): /lə bœ.ʁ‿e l‿aʁ.ʒɑ̃ dy bœʁ/

le beurre et l'argent du beurre m (uncountable)

1. (idiomatic) (having) one's cake and eating it too; two mutually exclusive things, such that one can only choose one over another

   Tu ne peux pas avoir le beurre et l’argent du beurre.

   You can't have your cake and eat it too.

While the French expression is used mostly with avoir and vouloir, a variety of construction with verbs such as obtenir or garder are possible, unlike in English.