Marshmallow mega-chocolate mini muffins

Another all day team meeting tomorrow - so I thought I'd make a batch of mini muffins to help us survive it! These are about the most chocolatey things I can imagine - a very chocolatey mixture plus chopped dark, milk and white chocolate. And the best bit... multi-coloured mini marshmallows! These are really quick to make and guaranteed to put smiles on faces.

Ingredients

2 ½ oz butter (plus extra for greasing)

10oz self-raising flour

3 ½ oz drinking chocolate powder

3oz golden caster sugar

1 ½ tsp baking powder

1 egg

300ml milk

100g milk chocolate, chopped

50g dark chocolate, chopped

50g white chocolate, chopped

50g mini marshmallows

Method

1. Preheat the oven to 190°C.  
2. Melt the butter and use a pastry brush to grease a 24-holed mini-muffin pan.
3. Sift the flour, drinking chocolate, sugar and baking powder into a large mixing bowl and mix together with a hand whisk.
4. In a jug, beat the egg and milk together.
5. Add the melted butter, egg and milk to the dry ingredients and beat well.
6. Fold in the chopped chocolate and marshmallows with a metal spoon.
7. Carefully spoon the mixture into the muffin cases and bake for 15 minutes or until a cake tester comes out clean. 
8. Remove to a wire rack and leave to cool in the tin completely before removing.