You could add a separated dessert to your weekly menu.

Chocolate chip cookies american recipe
White flour, vegetable oil, vanilla extract, eggs, butter, brown sugar, granulated sugar, salt and chocolate chips. 
(Per serving: cal 4,141; prot 1,3g; carb 1,249; fat 11g;  chol 28,9g; sod 346 mg=.
Price for a dozen: 15€

MÂȘ Luisa zuccini´s cake receipe
Zuccini, white flour, vegetable oil, salt, sugar, cinnamon, raisins, apple juice, eggs and walnuts.
(Per serving: Cal 762; prot 13g; carb 93g; fat 40g;  chol 82g; sod 606mg).
Price for a cake serving 8-10 people: 40

Ana´s favourite chocolate cake
White flour, cocoa, butter, eggs and sugar.
(Per serving: Cal 583; prot 5g; carb 64g; fat 16g;  chol 55g; sod 602mg).
Price for a cake serving 8-10 people: 40€