This overnight oats recipe takes about 5 minutes: stir rolled oats and milk together in a jar, add a little sweetener, and refrigerate overnight. By morning, you have a creamy, no-cook breakfast. Oats are rich in beta-glucan, a soluble fiber that helps lower LDL cholesterol as part of a heart-healthy diet, which makes them a great way to start the day.
February is American Heart Month, and one of the easiest heart-friendly habits I know starts at breakfast. Oatmeal has been a staple in my household for decades, especially on training days, because its carbohydrates fuel your muscles for exercise.
But here’s the thing: I’m up at 4 a.m. to train clients, and I have no interest in cooking half-asleep over the stove. My game-changer? Overnight oats. After more than 30 years as a personal trainer in San Diego, it’s still one of the breakfasts I recommend most to busy clients.
What are overnight oats?
Overnight oats are a no-cook version of oatmeal. You combine rolled oats with a liquid, such as milk or yogurt, and let the mixture sit in the refrigerator overnight. The oats soak up the liquid and soften, so by morning you have a creamy breakfast you can customize with endless toppings.
What are the health benefits of oats?
- Heart health: Oats contain beta-glucan, a soluble fiber. Eating about 3 grams of beta-glucan a day, as part of a diet low in saturated fat, can help lower LDL (“bad”) cholesterol. A serving of oats provides a good share of that.
- Fullness and weight management: Because of their fiber, oats digest slowly and help you stay full, which can reduce snacking.
- Steadier blood sugar: Soluble fiber slows carbohydrate digestion, especially when you pair oats with protein and fat.
- Nutrients: In addition, oats supply minerals like manganese, phosphorus, magnesium and iron.
- Training fuel: Oats are an easy source of carbohydrates before a workout.
Why make them overnight?
- Convenient: Prep several days of breakfasts in a few minutes.
- Versatile: Change the fruit, nuts and spices so every morning tastes a little different.
- Portable: Grab a jar on your way out the door.
- Easy on the stomach: Many people find soaked oats gentle and easy to digest before a workout.
Easy overnight oats recipe
This makes 2 servings, or 1 large serving for a big training day.
Ingredients:
- 1 cup rolled oats (old-fashioned, not steel-cut)
- 1 cup milk of your choice
- 1 to 2 tsp honey or maple syrup, or 1 Tbsp peanut butter
- Toppings of your choice: fresh fruit, nuts, seeds or spices
Instructions:
- In a large jar or container with a lid, combine the oats, milk and sweetener. Stir well.
- Add your toppings and give it a final stir. Alternatively, save crunchy toppings like nuts for the morning.
- Cover and refrigerate overnight, or for at least 6 hours.
- In the morning, stir and enjoy cold, or heat it in the microwave for a minute.
Approximate nutrition per serving (half the recipe with 2% milk and 1 tsp honey, before toppings): about 230 calories, 9 g protein, 39 g carbohydrate, 4 g fiber and 5 g fat.
5 flavor ideas for your overnight oats recipe
- Berry vanilla: Mixed berries, a splash of vanilla and a spoonful of Greek yogurt
- Peanut butter banana: Sliced banana, peanut butter and a sprinkle of cinnamon
- Apple pie: Diced apple, cinnamon, nutmeg and chopped walnuts
- Tropical: Mango, pineapple and unsweetened coconut
- Chocolate cherry: Cocoa powder, cherries and a few dark chocolate chips
How to add protein to this overnight oats recipe
On its own, oatmeal is fairly low in protein. So if you’re training hard or trying to stay full longer, boost it. For example, stir in 1/2 cup Greek yogurt (about 12 g protein), a scoop of protein powder (about 20 to 25 g), or 1 to 2 Tbsp chia or hemp seeds. Also, using dairy or soy milk instead of almond milk adds several grams. For more ideas, see my healthy breakfast ideas.
Storage tips
This overnight oats recipe keeps in the fridge for up to 4 or 5 days. As a result, you can prep several jars at once. However, add fresh fruit like banana the morning you eat them so it doesn’t brown. For more on planning ahead, read my meal prep tips.
Heart-healthy nutrition in San Diego
Breakfast is one small part of a heart-healthy lifestyle, along with regular exercise, good sleep and managing stress. The American Heart Association is a great resource for more. In my private studio in Bay Park, I pair one-on-one training with practical nutrition guidance, all built on the Chris Keith Method.
Want a nutrition and training plan that supports your heart? Text Chris at (619) 840-9099 for a free consultation.
Frequently Asked Questions
Have a question that isn’t covered here? See the full personal training FAQ.
Are overnight oats good for you?
Yes. Overnight oats are high in fiber, including beta-glucan, which supports healthy cholesterol levels. They’re filling and easy to customize. To keep them balanced, add protein like Greek yogurt and watch the amount of added sweetener.
Can you eat overnight oats warm?
Yes. Overnight oats are usually eaten cold, but you can microwave them for about a minute, stirring halfway, if you prefer a warm breakfast.
How long do overnight oats last in the fridge?
Overnight oats keep for about 4 to 5 days in a sealed container in the refrigerator. Add fresh fruit and crunchy toppings the day you eat them for the best texture.
Can I use steel-cut or instant oats for overnight oats?
Rolled oats work best. Instant oats get mushy, and steel-cut oats stay very chewy unless you soak them longer or use more liquid.
Chris Keith has over 30 years of personal training in San Diego (since 1995) and was voted Best Personal Trainer by San Diego Magazine. He trains clients one-on-one at his private studio in Bay Park. Learn more about Chris or contact Chris to get started.
