Peanut Butter Weetabix Porridge (1 serving) 2 or 3 Weetabix biscuits milk or water 2 Tablespoons peanut butter 1 banana sugar or splenda (optional) Place 2 or 3 Weetabix in a bowl and cover with milk, then mash them up a bit and place in the microwave. Heat for 2 minutes, stirring half way through. Stir until it's porridge-like, then mix in a chopped banana, 2 Tablespoons peanut butter, and sugar or sweetener if desired. Filling and healthy recipe that turns cereal biscuits into porridge. Mr Breakfast would like to thank kimbley73 for this recipe. Recipe number 3019. Submitted 5/8/2011.