Steps: 1. Preheat oven to 180C. 2. Sift flour and cocoa powder into a mixer bowl. 3. Add sugar, butter and eggs into the flour. 4. Beat the mixture until smooth and pale, about 2-3mins. 5. Fold in the chocolate chips. 6. Spoon batter into the baking paper cups until 60% full and sprinkle some chocolate chips on it. 7. Bake in the preheated oven for 25-30mins. 8. Remove cupcakes and cool on a wire rack.