Irresistible Single Serve Brownie Baked Oatmeal

If you ask me, brownies for breakfast are completely acceptable when oats are involved.

This single serve baked oatmeal tastes like a fudgy brownie but comes together in minutes with simple pantry staples. Mashed banana and cocoa powder create that rich, chocolatey flavor without any refined sugar.

It’s mixed up in one bowl and baked in a ramekin until the edges get crispy and the center stays soft. Chocolate chips melted throughout and flaky sea salt on top make it feel like a treat.

It’s a filling breakfast that satisfies your sweet tooth, perfect for those mornings when you want something warm and comforting just for yourself.

What Kind of Oats Should I Use?

For this recipe, old-fashioned rolled oats are your best bet since they hold their texture nicely during baking and give you that classic oatmeal consistency. Quick oats will also work in a pinch, though they’ll create a slightly softer, more cake-like texture. I’d steer clear of steel-cut oats here since they won’t soften enough in the short baking time and you’ll end up with a chewy, undercooked center. If you need a gluten-free option, just make sure to grab certified gluten-free oats since regular oats can sometimes be processed in facilities that also handle wheat.

Options for Substitutions

This single-serve breakfast is easy to customize based on what you have in your kitchen:

• Oats: Rolled oats work best here since they hold their texture during baking. Quick oats can work in a pinch, but they’ll create a softer, mushier texture. I’d avoid steel-cut oats as they won’t cook through properly.
• Banana: If you’re out of bananas, try using 1/4 cup of applesauce or mashed sweet potato instead. You might want to add a touch of honey or maple syrup since these aren’t quite as sweet as banana.
• Milk: Any milk works here – dairy, almond, oat, soy, or coconut milk all do the job. Just stick with unsweetened varieties unless you want it extra sweet.
• Egg: For an egg-free version, use 1 tablespoon of ground flaxseed mixed with 2.5 tablespoons of water. Let it sit for 5 minutes before adding to your mixture.
• Cocoa powder: Regular unsweetened cocoa powder is what you need here. Dutch-processed cocoa will work too, though it gives a slightly different flavor.
• Chocolate chips: Feel free to use whatever chocolate chips you like – dark, milk, or semi-sweet. You can also swap them for chopped nuts, dried fruit, or leave them out completely.

Watch Out for These Mistakes While Baking

The biggest mistake with single serve baked oatmeal is overbaking, which can turn your breakfast into a dry, crumbly mess – start checking at 12 minutes since small portions cook faster than you’d expect, and the center should still look slightly underdone when you pull it out.

Another common error is forgetting to grease your baking dish well enough, making it nearly impossible to get your oatmeal out in one piece, so use plenty of butter or cooking spray on the bottom and sides.

For a creamier texture, let your blended mixture sit for 5 minutes before baking so the oats can absorb some liquid, and if you want extra chocolatey flavor, stir a few chocolate chips into the batter instead of just sprinkling them on top.

Finally, don’t skip mashing your banana really well before blending – large chunks won’t break down completely and can create an uneven texture throughout your baked oatmeal.

What to Serve With Brownie Baked Oatmeal?

This brownie baked oatmeal is pretty filling on its own, but I love topping it with a dollop of Greek yogurt or a spoonful of peanut butter for extra protein to keep me full all morning. A drizzle of maple syrup or honey adds a nice touch of sweetness if you want it a bit more dessert-like. Fresh berries like strawberries or raspberries are great on the side since they balance out the chocolate flavor, or you could go all in and add a scoop of vanilla ice cream if you’re eating this as a treat. A hot cup of coffee or cold glass of milk makes it feel like a complete breakfast.

Storage Instructions

Store: This baked oatmeal is best enjoyed fresh and warm right out of the oven, but you can keep leftovers covered in the fridge for up to 2 days. Just know that the texture won’t be quite as fluffy after storing since it’s a single serving recipe.

Reheat: Pop it in the microwave for about 30-45 seconds to warm it back up. You might want to add a splash of milk before reheating to help bring back some moisture, especially if it seems a bit dry.

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 270-320
• Protein: 8-10 g
• Fat: 7-10 g
• Carbohydrates: 45-50 g

Ingredients

• 1/2 cup oats (I always use Quaker Old Fashioned for the best texture)
• 1/2 banana (mashed until smooth for moisture)
• 1 egg
• 1/4 cup milk
• 1 1/2 tbsp cocoa powder (I prefer Hershey’s Special Dark for a richer color)
• 1/4 tsp baking soda
• 1/8 tsp salt
• 1/4 tsp vanilla extract
• chocolate chips (Ghirardelli semi-sweet are my favorite here)
• sea salt (flaky salt used as a topping adds a nice crunch)

Step 1: Prepare Your Mise en Place and Preheat

• 1/2 banana, mashed until smooth
• 1/2 cup oats
• 1 1/2 tbsp cocoa powder
• 1/4 tsp baking soda
• 1/8 tsp salt

Preheat your oven to 350°F and lightly grease a single-serve baking dish (a small 8-ounce ramekin or 6-inch cake pan works perfectly).

Mash the banana until completely smooth—this creates moisture and helps bind the oatmeal together.

Measure out all your dry ingredients and have your egg and milk ready to go.

This prep work ensures the batter comes together quickly once you start mixing.

Step 2: Blend the Batter Base

• 1/2 banana, mashed from Step 1
• 1 egg
• 1/4 cup milk
• 1/4 tsp vanilla extract
• dry ingredient mixture from Step 1

Combine the mashed banana, egg, milk, and vanilla extract in a blender or food processor and blend until smooth.

Add the oats, cocoa powder, baking soda, and salt, then blend again until you have a cohesive, slightly thick batter with some texture from the oats.

I like to use Old Fashioned oats because they maintain a pleasant chewy texture rather than becoming too dense when blended.

The blending process ensures even distribution of the cocoa and leavening agents throughout the batter.

Step 3: Assemble and Bake

• batter from Step 2
• chocolate chips

Pour the batter from Step 2 into your prepared baking dish, then generously sprinkle chocolate chips over the top—I prefer Ghirardelli semi-sweet because they hold their shape and add a luxurious touch without being overly sweet.

Bake for 15 minutes until the top is set but still slightly tender when gently pressed; it should have a brownie-like consistency rather than being completely firm.

The baked oatmeal will continue to set slightly as it cools.

Step 4: Finish and Serve

• baked oatmeal from Step 3
• sea salt

Remove the brownie baked oatmeal from the oven and let it cool for just a minute or two.

While it’s still warm, top with a small pinch of flaky sea salt if desired—the salt adds a wonderful contrast to the rich chocolate and brings out the cocoa flavor beautifully.

Serve warm, either in the baking dish or transferred to a bowl, and enjoy immediately.

Irresistible Single Serve Brownie Baked Oatmeal

Delicious Irresistible Single Serve Brownie Baked Oatmeal recipe with step-by-step instructions.

Print Recipe Pin Recipe

Prep Time 5 minutes mins

Cook Time 15 minutes mins

Total Time 20 minutes mins

Servings 1 serving

Calories 295 kcal

Ingredients

  

• 1/2 cup oats (I always use Quaker Old Fashioned for the best texture)
• 1/2 banana (mashed until smooth for moisture)
• 1 egg
• 1/4 cup milk
• 1 1/2 tbsp cocoa powder (I prefer Hershey's Special Dark for a richer color)
• 1/4 tsp baking soda
• 1/8 tsp salt
• 1/4 tsp vanilla extract
• chocolate chips (Ghirardelli semi-sweet are my favorite here)
• sea salt (flaky salt used as a topping adds a nice crunch)

Instructions

 

• Preheat your oven to 350°F and lightly grease a single-serve baking dish (a small 8-ounce ramekin or 6-inch cake pan works perfectly). Mash the banana until completely smooth—this creates moisture and helps bind the oatmeal together. Measure out all your dry ingredients and have your egg and milk ready to go. This prep work ensures the batter comes together quickly once you start mixing.
• Combine the mashed banana, egg, milk, and vanilla extract in a blender or food processor and blend until smooth. Add the oats, cocoa powder, baking soda, and salt, then blend again until you have a cohesive, slightly thick batter with some texture from the oats. I like to use Old Fashioned oats because they maintain a pleasant chewy texture rather than becoming too dense when blended. The blending process ensures even distribution of the cocoa and leavening agents throughout the batter.
• Pour the batter from Step 2 into your prepared baking dish, then generously sprinkle chocolate chips over the top—I prefer Ghirardelli semi-sweet because they hold their shape and add a luxurious touch without being overly sweet. Bake for 15 minutes until the top is set but still slightly tender when gently pressed; it should have a brownie-like consistency rather than being completely firm. The baked oatmeal will continue to set slightly as it cools.
• Remove the brownie baked oatmeal from the oven and let it cool for just a minute or two. While it's still warm, top with a small pinch of flaky sea salt if desired—the salt adds a wonderful contrast to the rich chocolate and brings out the cocoa flavor beautifully. Serve warm, either in the baking dish or transferred to a bowl, and enjoy immediately.