Triple Chocolate Muffins

Name: Triple Chocolate Muffins
Prep time: 20 min
Cook time: 50 min
Total time: 50 min
Yield: 12 portion
Ingredients: 115 gram butter, unsalted (from cows' milk); 250 gram caster sugar; 125 gram whole cow milk; 225 gram self-raising wheat flour; 25 gram cocoa powder (all types); 2 egg, European medium (53-63 g) (from chicken); 5 gram salt; 75 gram dark chocolate chip; 75 gram milk chocolate chip; 75 gram white chocolate chip