- STEP 1
Preheat the oven to 180C. Line 24 muffin tins with muffin cases.
- STEP 2
Mix together eggs and sugar until light and fluffy. Add yogurt and butter, and mix until combined.
- STEP 3
In a seperate bowl combine the flour, cocoa, baking powder and bicarbonate of soda. Sieve into the egg mixture and mix well with the hand mixer.
- STEP 4
Add chocolate chunks and stir them in with a spoon.
- STEP 5
Spoon the mixture into 24 muffin cases. Bake for 15 minutes. Remove from the tins and cool on the wire rack.