Home Blogs Warm Peanut Butter and Banana Warm Peanut Butter and Banana November 14, 2012 1 banana, cut lengthwise in half 1 Tbsp. Smooth Peanut Butter 1 tsp.raisins USE small spoon to slightly hollow out centres of bananas; fill with peanut butter. Sprinkle with raisins. REASSEMBLE banana. Place on microwaveable plate. MICROWAVE on HIGH 15 to 20 sec. or until warm.