In bowl mix oil and milk whisk till combined together

Add powdered sugar, mix well. now sift all-purpose flour, cocoa powder,baking powder and baking soda. gradually add dry ingredients in wet ingredients.mix well add vinegar.mix well

Put liners in muffins mould. preheat OTG for ten minutes.put muffins mix in mould.put chopped walnuts on muffins.bake for 15 minutes. check if needed bake for 5 more minutes. serve hot.tastes yum.