2. Combine the yogurt, mashed bananas, and peanut butter in a large bowl. Make sure to mix your ingredients well. This will make sure that your dog isn't getting too much of one thing. Peanut butter is great for dogs, but in small doses. 3. Pour into 3-oz Dixie cups or muffin cups. Berst says you can swap the bananas for two tablespoons of peanut butter too. Or sub in or add blueberries, apples (without the seeds and core), watermelon , pumpkin and just about anything Put frozen banana slices in a food processor and blend. You'll need to scraped down the sides a few times. It will get pretty thick. 4. Keep blending until it smooths out into soft serve banana ice cream. 5. Add peanut butter and mix well. 6. Separate into 3-4 cups and freeze. vq0hOZi.