A 5 Ingredient Flapjack Recipe Youll need; Honey Peanut Butter Oats Dark Chocolate Butter 1. Add some peanut butter, butter and honey to a pan on medium-low heat until a runny smooth consistency. 2. Once smooth, add in your oats and cover them all in the mix. 3. Add it all to a tray and cook in the oven at 200*C for 15-20 mins. 4. Once cooked, Melt your dark chocolate and pour over the flapjack. 5. Let the chocolate cool down, then Enjoy! If you make this post your results below!