Here’s 4 Homemade Dog Treat Recipes (+ Precautions). 1. Peanut Butter Banana CookiesIngredients1 banana (ripe)1/4 cup natural peanut butter (unsalted, unsweetened)1 cup whole wheat flour1/2 cup oatsInstructionsPreheat the oven to 180°C (350°F).Mash the banana and mix it with peanut butter.Add whole wheat flour and oats, and mix until the dough comes together.Roll out the dough and use cookie ..