Chocolate Chips Muffin

Lightly whisk the eggs, cream, brown sugar and zest in a bowl. Sift the rest of the dry ingredients together and add 3/4 of the chocolate. Start adding the dry ingredients to the egg mixture and stir until two-thirds are mixed. Add the melted butter and finish with the rest. Butter the muffin pan and dust it with flour (or use paper moulds). Fill them two-thirds full, sprinkle with the rest of the chocolate and bake in a 190C oven for about 20min or until a toothpick comes out clean.