2 eggs
1 cup (200 g) sugar
1 cup (130 g) all-purpose flour
6 tablespoons cocoa powder
2 teaspoons baking powder
1 teaspoon vanilla essence
2/3 cup (160 ml) milk
2/3 cup (160 g) butter
4 oz (120 g) chocolate chips
Preheat oven to 350 deg F (Gas mark 4 or 180 deg C).
Grease 6 large muffin tins or cups (paper muffin bake cups are recommended).
Beat the eggs with sugar, mix with flour, cocoa powder, baking powder, vanilla and milk.
Fold in the melted butter.
Add chocolate chips (please note that these might end up in the bottom of the muffin).
Bake at 350 degrees until a until a wooden pick inserted in center comes out clean, approximately 30 minutes.