Pre-heat the oven at 180 degree centigrade for 15 minutes and grease an 8 inch pan.
Sieve together the dry ingredients. Add oil or butter into a bowl and beat in the sugar.
Whisk in the eggs along with vanilla essence. Add the dry ingredients and fold in well. Tip in the chocolate chips and fold into the batter.
Transfer this to the baking pan.
Microwave the peanut butter for 30 seconds and drop in diagonally. Using a toothpick, draw along the peanut butter creating swirl like patterns.
Bake at 180 degree centigrade for 20 to 25 minutes.
By Ria Samuel