Measure your base: For one serving, use 1/2 cup rolled oats, 1/2 to 3/4 cup milk, and 1/2 cup water.
Adjust liquids for thicker or looser oatmeal.
Heat the pot: Add oats, milk, water, a pinch of salt, and 1/4 teaspoon cinnamon to a small saucepan. Stir to combine.
Cook gently: Bring to a gentle simmer over medium heat, then reduce to low. Stir occasionally until the oats are creamy, about 5–7 minutes.
Add flavor: Stir in 1/2 to 1 tablespoon nut butter and a few drops of vanilla.
Taste and adjust sweetness with maple syrup or honey if you like.
Boost the protein (optional): If using protein powder, remove the pot from heat and mix in 1/2 scoop at a time with a splash of extra milk to keep it smooth. For Greek yogurt or cottage cheese, fold in 1/4 to 1/3 cup off the heat until creamy.
Plate and top: Spoon into a bowl. Add sliced banana or berries, a sprinkle of nuts or seeds, and an extra drizzle of nut butter.
Tweak texture: If it thickens too much, stir in a splash of hot water or milk.
If it’s too thin, simmer another minute.