Chocolate Muffin

flour 210g, Cocoa Powder 50g, Baking Powder 1 1/2 tsp., Baking Soda 1/2 tsp., Salt 1/2 tsp., Caster Sugar 200g, Butter(melted) 90g, cooking oil 30g 2 Eggs, Milk 170ml, Baking Chocolate(cut to small pieces) or Chocolate chips 1/2 cup 1) Sift flour,cocoa powder,baking powder,baking soda, mix togerher, add salt & sugar,mix well 2) Egg slightly beat,add in butter,oil, and milk,mix well. 3) Add (2) into (1)(mixed flour),mix it until just combind.Add chocoalate pieces and stir well. 4) Pre-heat oven 170*C. pour batter into cup cake mould. Bake 18-20 minutes. ,