Brown Sugar Cinnamon Oatmeal

Introduction

Brown sugar, cinnamon, and quick-cooking oats bake into a firm oatmeal you can slice or spoon straight from the pan. With a 9-inch pan and a 40–45 minute bake, this works well for breakfast meal prep and also holds up served hot or cold.

Recipe Details

• Prep Time: 10 minutes
• Cook Time: 45 minutes
• Total Time: 55 minutes
• Servings: 8

Ingredients

• 3 cups (720 g) quick-cooking oats
• 1 cup (240 g) brown sugar
• 2 teaspoons baking powder
• 1 teaspoon ground cinnamon
• 1 teaspoon salt
• 1 cup (240 ml) milk
• ½ cup (120 g) butter (melted)
• 2 eggs

Instructions

1. Mix the ingredients and pour them into a 9-inch (20 cm) baking pan. They can also be carefully mixed in the pan.
2. Bake at 350 °F (175 °C) for 40-45 minutes.
3. Serve hot, cold, with or without milk.

Variations

• Swap the milk for an unsweetened non-dairy milk such as almond or oat milk if you need a dairy-free option; the texture stays similar, though the flavor changes slightly depending on the milk you use.
• Replace part of the ground cinnamon with pumpkin pie spice or apple pie spice if you want a warmer, more layered spice profile without changing the structure.
• Stir in raisins after mixing the batter if you want more chew and a sweeter finish throughout the baked oatmeal.
• Use dark brown sugar instead of light brown sugar for a deeper molasses flavor and a slightly richer color.
• Melt the butter until it lightly browns before adding it to the mixture if you want a nuttier, toastier flavor in the finished oatmeal.

Tips for Success

• Use quick-cooking oats, not steel-cut oats; steel-cut oats will not soften properly in the 40–45 minute bake time.
• If you mix directly in the pan, stir carefully so the baking powder and cinnamon are evenly distributed and you do not end up with pockets of dry ingredients.
• Bake until the center looks set and the edges are lightly browned; if the middle still looks wet, give it a few more minutes.
• Let it sit for 5–10 minutes after baking if you want cleaner portions; it firms up as it cools.
• If your butter is very hot when melted, let it cool briefly before mixing so it does not start cooking the eggs.

Storage and Reheating

Store leftovers in an airtight container in the fridge for up to 4 days. You can also cover the baking pan tightly and refrigerate it directly if you plan to eat it within a day or two.

For longer storage, cut into portions, wrap or separate with parchment, and freeze in a freezer-safe container for up to 2 months.

Reheat individual portions in the microwave for 30–60 seconds, adding a splash of milk if you want a softer texture. You can also reheat larger amounts in a 325 °F oven, covered, for 10–15 minutes until warmed through. It also eats well cold.

FAQ

Can you use old-fashioned oats instead of quick-cooking oats?

Yes, but the texture will be chewier and less uniform. You may also need a few extra minutes of baking time.

Can you reduce the brown sugar?

Yes. Reducing it will make the oatmeal less sweet and slightly less soft, since the sugar also affects moisture and texture.

How do you know when it is done baking?

The top should look set, the center should no longer appear wet, and the edges should be lightly browned. A knife inserted near the center should come out mostly clean.

Can you make this dairy-free?

Yes. Use a non-dairy milk in place of the milk and a dairy-free butter substitute in place of the butter.