Slow Cooker Breakfast

Overnight Slow Cooker Rolled Oatmeal with Raspberries and Honey

Rolled oats, not steel-cut, and a cooker that switches itself to warm.

370 min · 6 servings · Slow cooker

A white bowl of thick creamy oatmeal with visible whole rolled oats, topped with glossy dark red raspberries in syrup and drizzled with amber honey

Recipe by Sara Maren

on Recipesdarleen

32 recipes by Sara Maren

Published November 5, 2025

How Recipesdarleen publishes recipes

Eight ingredients and six hours and ten minutes, six of which happen while you are asleep.

The compote is the only part made in the morning, and it takes a few minutes.

Why This Recipe Works

  • Rolled oats stay visibly whole across six hours where instant ones dissolve.
  • Milk and water together give creaminess without the oats catching.
  • A programmable cooker that switches to warm stops six hours becoming eight.
  • Stirring at the end is what pulls a set surface back into a creamy porridge.
  • Cooking the raspberries only briefly leaves some of the berries intact.

Ingredient Notes

Old-fashioned rolled oats
Two cups. Rolled specifically — steel-cut behaves differently over six hours and instant oats vanish entirely into the liquid.
Milk and water
Four cups and two. Three parts liquid to one of oats, split between the two so it stays creamy without scorching.
Raspberries with maple syrup or sugar
Two cups with two tablespoons, cooked only until glossy. Some berries should still be whole when it comes off the heat.
Honey, for drizzling
Added at the bowl rather than in the pot, and lightly. The title does not name it, but it is visible on the finished bowl.

How to Make It

  1. The slow-cooker insert greased lightly

    Grease the slow-cooker insert lightly.

  2. Oats, milk, water, salt and vanilla combined in the cooker

    Combine rolled oats, milk, water, salt, and vanilla in the slow cooker.

  3. Cooked on LOW about six hours in a cooker that switches to warm

    Cook on LOW for about 6 hours using a programmable slow cooker that switches to warm; stir once near the end if practical.

  4. Raspberries cooked briefly with maple syrup, some berries left whole

    Cook raspberries briefly with maple syrup or sugar until glossy and syrupy but some berries remain intact.

  5. The oatmeal stirred thick and creamy, then portioned

    Stir the oatmeal until thick and creamy, then portion into bowls.

  6. Topped with the compote and a light honey drizzle

    Top with raspberry compote and a light honey drizzle.

Six Hours Asleep, Five Minutes Awake

Almost all of this recipe happens without anyone in the room, which puts the weight on two decisions made before the lid goes on: WHICH OAT, and WHICH COOKER. The oats are OLD-FASHIONED ROLLED OATS RATHER THAN STEEL-CUT, and the cooker is a programmable one that switches itself to warm. Everything after those two is short.

  1. Stage 1 of 5

    GREASE the insert - a small step with a long consequence

    Steps 1–1 of 6

    GREASE THE SLOW-COOKER INSERT LIGHTLY. Six hours of milk and oat starch against a bare ceramic wall welds itself on, and the ring it leaves comes off the sides of the porridge as well as the pot. Lightly is enough; this is about release rather than fat.

    1. The slow-cooker insert greased lightlyGrease the slow-cooker insert lightly.
  2. Stage 2 of 5

    The RATIO - 2 cups oats to SIX cups of liquid

    Steps 2–2 of 6

    2 cups OLD-FASHIONED ROLLED OATS with 4 cups MILK, 2 cups WATER, 1/4 tsp KOSHER SALT and 1 tsp VANILLA EXTRACT. Three parts liquid to one part oat, and it is split between milk and water deliberately - all milk over six hours scorches at the edges, all water gives a thin porridge. ROLLED matters: you want WHOLE VISIBLE OATS in the finished bowl, and instant oats would have dissolved into the milk hours earlier.

    1. Oats, milk, water, salt and vanilla combined in the cookerCombine rolled oats, milk, water, salt, and vanilla in the slow cooker.
  3. Stage 3 of 5

    SIX HOURS on LOW - in a cooker that SWITCHES TO WARM

    Steps 3–3 of 6

    COOKED ON LOW FOR ABOUT 6 HOURS USING A PROGRAMMABLE SLOW COOKER THAT SWITCHES TO WARM; STIR ONCE NEAR THE END IF PRACTICAL. The appliance specification is part of the recipe rather than an aside - an overnight cook that runs long on LOW dries the oats out and catches them at the base, and the automatic switch to warm is what stops that happening while everyone is asleep. For safety, use A FUNCTIONING SLOW COOKER, and the perishable MILK-AND-OAT MIXTURE MUST NOT SIT AT ROOM TEMPERATURE BEFORE COOKING: combine and start it in one go.

    1. Cooked on LOW about six hours in a cooker that switches to warmCook on LOW for about 6 hours using a programmable slow cooker that switches to warm; stir once near the end if practical.
  4. Stage 4 of 5

    The COMPOTE - BRIEF, and some berries stay WHOLE

    Steps 4–4 of 6

    2 cups RASPBERRIES cooked BRIEFLY with 2 tbsp MAPLE SYRUP OR SUGAR UNTIL GLOSSY AND SYRUPY BUT SOME BERRIES REMAIN INTACT. Two endpoints again, and the second is what keeps this a compote rather than a sauce. Raspberries collapse fast - a minute past glossy and there is nothing whole left. The photograph shows recognisable dark red berries sitting on the oatmeal.

    1. Raspberries cooked briefly with maple syrup, some berries left wholeCook raspberries briefly with maple syrup or sugar until glossy and syrupy but some berries remain intact.
  5. Stage 5 of 5

    STIRRED, then the two things the title does not name

    Steps 5–6 of 6

    STIR THE OATMEAL UNTIL THICK AND CREAMY, THEN PORTION INTO BOWLS. Six hours undisturbed leaves a set skin over a dense mass, and that final stir is what pulls it back into porridge. Then TOPPED WITH RASPBERRY COMPOTE AND A LIGHT HONEY DRIZZLE - neither the raspberries nor the honey appears in the title, and both are part of the finished bowl. LIGHT is the instruction on the honey; the compote already carries maple syrup or sugar. Leftovers are REFRIGERATED PROMPTLY.

    1. The oatmeal stirred thick and creamy, then portionedStir the oatmeal until thick and creamy, then portion into bowls.
    2. Topped with the compote and a light honey drizzleTop with raspberry compote and a light honey drizzle.

Success Tips

  • Grease the insert; six hours of milk and starch will stick to a bare one.
  • Use a cooker that switches to warm rather than one that simply stays on LOW.
  • Stir the compote off the heat as soon as it goes glossy, or the berries collapse.

Serving Ideas

Six bowls of thick creamy oatmeal with visible whole rolled oats, topped with glossy dark red raspberries in syrup and drizzled lightly with amber honey.

Frequently Asked Questions

Can I use steel-cut oats instead?

The recipe is written for old-fashioned rolled oats. They stay visibly whole over six hours, which is what the finished bowl looks like — steel-cut oats behave differently over that time.

What kind of slow cooker do I need?

A functioning programmable one that switches itself to warm at the end of the cook. That is what keeps six hours from turning into eight overnight.

Can I mix it the night before and start it later?

No. Milk and oats are perishable, so do not leave the mixture standing at room temperature before cooking. Combine and start it in one go, and refrigerate leftovers promptly.

Recipesdarleen

Overnight Slow Cooker Rolled Oatmeal with Raspberries and Honey

Rolled oats, not steel-cut, and a cooker that switches itself to warm.

Prep
10 min
Cook
360 min
Total
370 min
Yield
6 servings

Slow cooker

EquipmentProgrammable slow cooker · Small saucepan · Wooden spoon

Before you startCombine and start it in one go — a milk-and-oat mixture should not stand at room temperature waiting.

Ingredients

Instructions

  1. Grease the slow-cooker insert lightly.
  2. Combine rolled oats, milk, water, salt, and vanilla in the slow cooker.
  3. Cook on LOW for about 6 hours using a programmable slow cooker that switches to warm; stir once near the end if practical.
  4. Cook raspberries briefly with maple syrup or sugar until glossy and syrupy but some berries remain intact.
  5. Stir the oatmeal until thick and creamy, then portion into bowls.
  6. Top with raspberry compote and a light honey drizzle.