Healthy muffins with no sugar and good protein. It's an extremely easy recipe, but I added lots of tips to the directions so don't be scared off. I was just being descriptive to help out new cooks (I found that beneficial when I dove into the world of clean eating and leaning to cook). Don't expect a sweet desert muffin, but more of a breakfast muffin with sweetness from the apple pieces. Don't get me wrong, these muffins are DELISH! To make nut-free just substitute the peanut butter for 2 tablespoons of apple sauce or 2 tablespoons of a neutral oil (grapeseed, vegetable, canola)m use raisins or other fruit instead of the walnuts, and regular milk for the almond milk. This recipe is vegetarian, but can be made vegan by omitting the yogurt and using 1/4 cup of apple sauce instead (you can use the applesauce for the oil replacement & yogurt replacement in the same batch) and use egg replacer for the eggs (or 3 tbsp ground flax to 6 tbsp water - mix and let stand 2 minutes). If replacing the egg, add 1/4 cup of moisture in. You can do this in many ways. For example, you can use either fruit (blueberries, strawberries, raspberries, etc.), vegan yogurt, applesauce (yes, more applesauce), more mashed banana, soy/almond/coconut milk or a combination of all of these.