Preheat the oven at 180°c.Cream butter and sugar together, add oil, vanilla and eggs and beat well. Add sifted flour, baking powder then milk. Mix through to form a smooth batter.Line 2 cupcake trays with cupcake holders or grease cupcake pans. Add 1Tbs batter in each and bake in a preheated oven for 20 mins. Leave to cool.Makes 24 cupcakes