Nourishing Overnight Grain Bowl

Featured in: Start Your Day with Delicious Breakfast Recipes

This overnight porridge combines steel-cut oats, brown rice, millet, barley, wild rice, polenta, and flaxseed in a slow cooker for effortless preparation. Simply mix all ingredients with water, set your slow cooker to low, and wake up to a warm, nutritious breakfast. The varied grains create a delightful texture contrast while delivering exceptional fiber and nutrients. Customize with your favorite toppings like fresh fruit, nuts, or a drizzle of honey.

A woman in a kitchen smiling.
Updated on Tue, 01 Jul 2025 23:33:57 GMT
Bowl of oatmeal with strawberries and blueberries. Pin it
Bowl of oatmeal with strawberries and blueberries. | quickietreats.com

This wholesome overnight porridge combines six different grains for a nutritious breakfast that practically cooks itself while you sleep. The slow cooker does all the work, transforming simple ingredients into a creamy, hearty morning meal that will keep you satisfied until lunch.

I discovered this recipe during a particularly busy week when morning meal prep seemed impossible. After trying it once, my entire household was converted to this no-fuss breakfast approach that still feels special and nourishing.

Ingredients

  • Steel-cut oats: Provide exceptional texture and nutty flavor while containing more fiber than rolled varieties
  • Short-grain brown rice: Adds creaminess and subtle sweetness while offering complete protein
  • Millet: Brings mild flavor and valuable minerals including magnesium and phosphorus
  • Whole-grain barley: Contributes chewy texture and impressive fiber content for digestive health
  • Wild rice: Offers distinctive flavor and higher protein content than other rice varieties
  • Polenta or corn grits: Add silky consistency and gentle sweetness to balance the heartier grains
  • Ground flaxseed: Boosts omega-3 fatty acids and adds subtle nutty notes
  • Salt: Enhances all flavors and brings balance to the mixture
  • Water: Transforms these simple ingredients through slow cooking into a cohesive porridge

Step-by-Step Instructions

Combine Ingredients:
Add all grains, flaxseed, salt and water to your slow cooker insert. The precise measuring of each grain creates the perfect balance of textures in the final porridge. Take care to stir briefly to ensure all dry ingredients are fully moistened before cooking begins.
Set Your Slow Cooker:
Cover the slow cooker with its lid and set the temperature to low. This gentle heat allows the grains to slowly absorb liquid and release their starches. Eight hours is the ideal cooking time to achieve the perfect consistency without any grains becoming mushy.
Stir Before Serving:
After the cooking cycle completes, remove the lid and stir the porridge thoroughly. The bottom may appear slightly thicker than the top, so proper stirring incorporates all textures. This also helps distribute the flaxseed evenly throughout the mixture.
A bowl of oatmeal with berries and bananas. Pin it
A bowl of oatmeal with berries and bananas. | quickietreats.com

The barley in this recipe completely transforms during slow cooking. When I first created this porridge, I was skeptical about including it, but now consider it the secret ingredient that gives this breakfast its uniquely satisfying texture. Something magical happens as it releases its starches overnight.

Customizing Your Porridge

This porridge creates the perfect canvas for both sweet and savory toppings. For sweet variations, try fresh berries, sliced banana, and a drizzle of maple syrup. Savory enthusiasts might enjoy adding a poached egg, avocado slices, and a sprinkle of everything bagel seasoning. The neutral base adapts beautifully to whatever ingredients you have available.

Make-Ahead Meal Prep

Once cooled, this porridge keeps beautifully in the refrigerator for up to five days. Store in individual containers for grab-and-go breakfasts throughout the week. When reheating, add a splash of milk or water to restore the creamy consistency, then microwave for approximately 90 seconds, stirring halfway through. The texture remains remarkably consistent even after refrigeration.

Nutritional Benefits

This multi-grain porridge delivers an impressive nutritional profile that single-grain breakfasts cannot match. The combination provides complementary amino acids for complete protein, various fiber types for digestive health, and a spectrum of vitamins and minerals. The slow cooking process also makes nutrients more bioavailable compared to quick-cooking methods. This breakfast particularly excels at providing sustained energy without the mid-morning crash associated with high-sugar alternatives.

A bowl of cereal with berries and nuts. Pin it
A bowl of cereal with berries and nuts. | quickietreats.com

Frequently Asked Questions

→ Can I substitute any of the grains in this porridge?

Yes, you can substitute any of the grains based on your preference or what you have available. Just maintain the same total proportions. Quinoa, amaranth, or buckwheat would work well as alternatives.

→ How long does this porridge keep in the refrigerator?

The cooked multigrain porridge will keep well in an airtight container in the refrigerator for 4-5 days. Reheat portions with a splash of milk or water.

→ What are some good toppings for this porridge?

Fresh fruits like berries or sliced bananas, toasted nuts, seeds, a drizzle of honey or maple syrup, a dash of cinnamon, or a dollop of yogurt all make excellent toppings.

→ Can I make this without a slow cooker?

Yes, you can simmer it on the stovetop on low heat for about 45-60 minutes, stirring occasionally, or use a rice cooker on the porridge setting.

→ Is this porridge freezer-friendly?

Absolutely! Portion the cooled porridge into individual containers and freeze for up to 3 months. Thaw overnight in the refrigerator and reheat with a little extra liquid.

→ How can I adjust the texture if I prefer thicker or thinner porridge?

For thicker porridge, reduce the water by 1-2 cups. For thinner porridge, add more liquid when reheating or initially use up to 9 cups of water.

Overnight Multigrain Porridge

A wholesome blend of seven grains slow-cooked to perfection while you sleep, creating a nutritious morning meal.

Prep Time
10 Minutes
Cook Time
480 Minutes
Total Time
490 Minutes
By: Mia


Difficulty: Easy

Cuisine: American

Yield: 6 Servings (6 bowls of porridge)

Dietary: Vegan, Vegetarian, Dairy-Free

Ingredients

→ Grains and Seeds

01 ½ cup steel-cut oats
02 ½ cup short-grain brown rice
03 ½ cup millet
04 ½ cup whole-grain barley
05 ⅓ cup wild rice
06 ¼ cup polenta or corn grits (not instant)
07 3 tablespoons ground flaxseed

→ Seasonings

08 ½ teaspoon salt

→ Liquids

09 8 cups water

Instructions

Step 01

Combine the oats, rice, millet, barley, wild rice, grits, flaxseed, salt, and water in the slow cooker.

Step 02

Cover and cook on low for 8 hours or overnight.

Step 03

Stir well before serving.

Notes

  1. This nutritious multi-grain porridge develops a rich, creamy texture while cooking overnight in your slow cooker.
  2. Consider adding fresh fruits, nuts, or a drizzle of honey when serving for extra flavor.

Tools You'll Need

  • Slow cooker
  • Measuring cups and spoons

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains gluten from barley and potentially oats

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 210
  • Total Fat: 2.8 g
  • Total Carbohydrate: 42.5 g
  • Protein: 6.3 g