Blueberry Baked Oatmeal
Bake once, breakfast all week. Warm, cakey oats studded with jammy blueberries — wonderful fresh or reheated.
Method
- Heat the oven to 375°F (190°C) and butter an 8x8 baking dish.
- Stir together the oats, brown sugar, baking powder, cinnamon and salt.
- Whisk the milk, egg, melted butter and vanilla, then fold into the dry mix.
- Fold in most of the blueberries, pour into the dish, and scatter the rest on top.
- Bake 38–42 minutes, until set in the center and golden at the edges.
- Cool 10 minutes. Serve warm, with a splash of milk or a dollop of yogurt.
Cook's notes
- Cut into squares and refrigerate up to 5 days; reheat 30 seconds in the microwave.
- Frozen blueberries work great — don't thaw, just fold them in.
- Swap in diced apple and chopped pecans in the fall.
What this costs to make
$0.21 per serving · $1.26 for the whole recipe (6 servings)
| Milk, whole | $0.55 |
|---|---|
| Butter, stick | $0.37 |
| Eggs, grade A large | $0.18 |
| Sugar, white | $0.16 |
| Total (priced items) | $1.26 |
Priced 4 of 10 ingredients using U.S. average retail prices for 2026-07, published by the Bureau of Labor Statistics via FRED. Not included: (180g) rolled oats, baking powder, cinnamon, salt, vanilla, (220g) blueberries. These are national averages — not what you will pay. Store, region and week all move them.
Why this works
Baking sets the egg and milk into a custard around the oats, which is what makes this sliceable rather than porridge-like. The oats stay distinct because they bake rather than simmer — no stirring means no starch released.
If it goes wrong
Wet in the middle means it needed longer; test with a knife in the center, which should come out clean. Dry and crumbly means too much oat for the liquid, or an oven running hot — check with a thermometer.
Make it your own
Any firm fruit works: raspberries, diced apple, pear. Frozen berries go in frozen, not thawed. Swap half the milk for buttermilk for tang, or add a mashed banana for sweetness without more sugar.
Storing and reheating
Excellent make-ahead — keeps 5 days refrigerated and reheats in the microwave in 45 seconds. Freezes well in portions for 2 months.
More breakfast ideas
Fluffy Buttermilk Pancakes
Tall, cloud-soft pancakes with crisp golden edges. The buttermilk and a rested batter do all the heavy lifting.
Classic French Toast
Custardy in the middle, caramelized at the edges. Day-old bread is the move, and a splash of vanilla makes it sing.
The Perfect Cheese Omelette
Soft, just-set, and folded around a melty middle. Low heat and constant motion turn three eggs into something French-bistro good.