Took this recipe from a book, "Chocolate and Baking", that I bought years ago. =P

Hazelnut Chocolate Chip Muffin

Ingredients
100g soft margarine
225 castor sugar
2 large eggs
150ml natural yogurt
5 tbsp milk
275g flour
1 tsp baking soda
100g hazelnuts, toasted and chopped
75g chocolate chips

1. Line muffins tins with paper cases.
2. Place margarine and sugar in a large mixing bowl and beat till light and fluffy.
3. Beat in eggs, yogurt and milk until combined.
4. Sieve flour and baking soda and add to mixture. Stir until just blended.
5. Stir in hazelnuts and chocolate chips.
6. Spoon the mixture into paper case, to about 3/4 filled.
7. Bake at 190 degree celcius for 25 min.