Preheat oven to 180°c and grease your baking tin.

Beat the margarine and sugar till fluffy and pale in colour.

Beat in the eggs one at a time. Add in the vanilla essence and mix to incorporate.

Fold in the flour alternating with milk to get the right consistency.

Divide the batter into 2 parts and to one part, add the orange essence and mix well.

Pour the batter in the tin, alternating the plain batter with the orange batter.

Bake for 45 mins in the preheated oven or until a skewer inserted comes out clean. Let it cool and enjoy.