Nutella Stuffed Whole Wheat Peanut Butter Banana and Zucchini Muffins

Bahan-bahan (24 porsi)

• 2 ripe bananas (mashed)
• 1 cup shredded zucchini
• 1/2 cup creamy peanut butter
• 1/4 cup canola oil
• 1 egg
• 1 teaspoon vanilla
• 1/2 cup brown sugar
• 1 3/4 cup whole wheat pastry flour
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1/4 cup chocolate chips
• 12 tablespoons heaping Nutella