Orange and chocolate cake

My husband this evening said: "I would like to eat a chocolate and orange cake!" "ok, it'a (it's) great idea! The kitchen is yours! I'm tired now - I've just finished to wash dishes (I've just finished washing the dishes)...". Two minutes later he was already at work: 3 eggs, some sunflower oil, 200 gr of flour, sugar (but less than recipe says), chocolate, orange juice, baking powder, some milk.

He mixed sugar, eggs, flour, oil, baking powder. Than (then) he divided "pasta" (how can I say it in english??) (dough) into two parts: in the first added chocolate powder and some milk, in the other one orange juice.
At the end he mixed them into a "stampo" (another word I don't know how to translate in the right way!) (a pan) and put it into a hot oven.

Now we are waiting the thirty minutes cake needs to cook, so I thought to use this time making english practice with Italki!