Place all ingredients, except raisins, walnuts, maple syrup, and vanilla in slow cooker in order listed. Gently stir.
Cook on low for 6 to 8 hours. (An appliance timer is useful for limiting length of cooking time. See note #3.)
When cereal is done, remove lid and stir in remaining ingredients. Cereal may be thin, but will thicken when stirred.
Serve hot with optional toppings.
Notes
1. This recipe is for a small (1 1/2- to 2-quart) slow cooker. Recipe may be adjusted for different size slow cookers.2. All slow cookers cook differently. The amount of liquid given works well for most slow cookers. If your cooker tends to lose more or less liquid than most, you may need to adjust the liquid amount in the recipe.3. If you would like your slow cooker to turn on and off automatically, you can plug it into an appliance timer. Click here for more information about successfully cooking cereal in a slow cooker.4. For best results, do not remove lid during cooking process.Yield: 3 to 4 servings* * * This recipe for Overnight Oats Deluxe is . . . gluten-free, plant based, oil-free, sugar-free, high in fiber, dairy free, egg-free, vegetarian, vegan, and made from real, whole foods.