Slow Cooker Overnight Steel-Cut Oats with Yogurt and Berries

Name: Slow Cooker Overnight Steel-Cut Oats with Yogurt and Berries
Prep time: 10 min
Total time: 10 min
Yield: 4 servings
Cuisine: American
Ingredients: 1½ cups (150 g) steel-cut oats (not rolled or instant); 2½ cups (600 ml) whole milk; 1½ cups (360 ml) water; 1 teaspoon (5 ml) vanilla extract; ¼ teaspoon (1½ g) kosher salt; ½ teaspoon (1 g) ground cinnamon (optional); ¾ cup (180 g) plain Greek yogurt (2% or full-fat), at room temperature; 1½ cups (225 g) mixed fresh or frozen berries (blueberries, raspberries, blackberries); 2 tablespoons (30 ml) honey (optional)

From the MyKitchenBank Kitchen

Steel-cut oats cooked overnight in a slow cooker develop a creamy, custard-like texture without constant stirring. Greek yogurt swirled in just before serving adds tang and creaminess, while fresh or frozen berries provide bright color and natural sweetness. Perfect for make-ahead breakfasts that taste like comfort food but require minimal morning effort.

Prep: 10 min
Cook: —
Wait: 8 hr
Total: 8 hr 10 min
Makes: 4 bowls (about 1¼ cups per serving)

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Steps

Before you start

Use a slow cooker sized for 4 quarts or larger
Measure all ingredients before bed so assembly takes just 5 minutes
If using frozen berries, add them directly from the freezer—no thawing needed

1
Prepare the slow cooker
- Lightly coat the ceramic insert of a 4-quart slow cooker with cooking spray or a thin layer of butter.
- This prevents the oats from sticking to the sides and makes cleanup easier.
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Tip: Even with a greased insert, the slow cooker may develop a thin crust on the sides—this is normal and adds nutty flavor.
2
Combine dry ingredients
- Pour 1½ cups steel-cut oats, ¼ teaspoon kosher salt, and ½ teaspoon ground cinnamon (if using) into the slow cooker insert.
- Stir to combine evenly.
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Tip: Mixing the cinnamon evenly at the beginning prevents clumping and ensures consistent flavor throughout the oats.
3
Add liquid and vanilla
- Pour in 2½ cups whole milk and 1½ cups water.
- Stir in 1 teaspoon vanilla extract.
- Stir the mixture well so no dry oats remain at the bottom of the insert.
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Ready when: All oats are moistened and no lumps remain
Tip: The ratio of liquid to oats is crucial—too little liquid results in thick, dry oats; too much makes them soupy. This recipe is calibrated for creamy, spoonable texture.
4
Cook overnight on low
- Cover the slow cooker and cook on LOW for 8 hours (or overnight).
- The oats will absorb the liquid and become tender and creamy.
- Do not stir during cooking—this develops the best texture.
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Ready when: Oats are tender when bitten, with a slight chew, and have absorbed most of the liquid into a creamy consistency
Tip: Slow cookers vary in temperature—check at 7.5 hours if cooking overnight. If the oats look too thin, cook 15–30 minutes more.
5
Stir and taste
- In the morning, stir the oats with a wooden spoon or silicone spatula.
- The texture should be porridge-like—thick and creamy.
- If they've thickened too much or cooled, stir in up to ¼ cup additional milk to reach the desired consistency.
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Ready when: Oats are spoon-able and creamy, with no gritty texture
Tip: Taste a bite and adjust salt or cinnamon here if needed. The oats will be very hot—let them cool slightly before tasting.
6
Divide into bowls
- Spoon the hot oats into 4 bowls, dividing evenly (about 1¼ cups per serving).
- Leave a small well in the center of each bowl for the yogurt and berries.
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Tip: If serving all 4 bowls at once, work quickly so they stay warm while you add toppings.
7
Add yogurt and berries
- Top each bowl with about 3 tablespoons Greek yogurt.
- Distribute 1½ tablespoons honey (if using) across the 4 bowls, drizzling it over the yogurt.
- Add about ⅓ cup mixed berries to each bowl, letting them nestle into the yogurt and oats.
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Tip: Don't stir the yogurt into the hot oats yet—let each person swirl it in to their liking, which creates marbled texture and keeps the yogurt cool against the warm oats.
8
Serve immediately
- Serve each bowl right away while the oats are warm and the yogurt is cool.
- The contrast of temperatures and textures is essential to the dish.
- Eat as-is, or swirl the yogurt and berries into the oats with your spoon.
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Tip: If anyone prefers their oats cooler, let them sit uncovered for 2–3 minutes before topping and eating.

Good to know

Tips

Steel-cut oats are essential—rolled or instant oats will turn mushy and lose their signature chew. Do not substitute.
The slow cooker's LOW setting is slower and more gentle than HIGH, which can cause the oats to become sticky or burn around the edges. Never use HIGH for overnight cooking.
Yogurt is added cold just before serving to create a textural and temperature contrast; if mixed in while the oats are very hot, it will break down into liquid.
For a thicker, more pudding-like consistency, reduce the milk to 2 cups and water to 1 cup. For a thinner, more porridge-like consistency, increase both liquids by ¼ cup.

Make ahead

Prepare the slow cooker up through step 3 (oats, salt, cinnamon, milk, water, and vanilla combined) 1 hour before bedtime. Cover and refrigerate the insert. In the morning, place the cold insert into the slow cooker base, set to LOW, and cook for 8–8.5 hours. Cold-start cooking may add 15–30 minutes to the total time. Yogurt and berries must be added just before serving.

Storage & reheating

Leftover cooked oats (without yogurt and berries) keep in an airtight container in the refrigerator for up to 3 days. Reheat gently in the microwave (stirring every 30 seconds) or on the stovetop over medium-low heat, adding a splash of milk to restore creaminess. Do not freeze cooked oats—the texture becomes grainy upon thawing. Yogurt and berries are best added fresh.

Substitutions

whole milk → 2% milk, almond milk, or oat milk. 2% milk will make the oats slightly less creamy; plant-based milks work well but may separate slightly—stir before serving. Avoid skim milk, which results in thin oats.
plain Greek yogurt (2% or full-fat) → sour cream, crème fraîche, or plain full-fat yogurt. Sour cream and crème fraîche add tang; use the same amount. Full-fat yogurt is creamier but less tangy than Greek yogurt—reduce to ½ cup if preferred.
mixed fresh or frozen berries (blueberries, raspberries, blackberries) → diced fresh peaches, sliced strawberries, diced apple, or banana slices. Apples and pears hold up well; bananas soften but add creaminess. Add soft fruits (peaches, strawberries) just before serving to prevent sogginess.
honey → maple syrup, agave nectar, or granulated sugar. Maple syrup adds earthiness; use equal amounts. Brown sugar (1½ tablespoons) adds molasses notes. Agave and sugar dissolve more easily when drizzled warm.