Prep your oats: If you have time, soak 1/2 cup rolled oats in 1/2 cup milk for 10 minutes to soften. If not, skip the soak and blend a little longer.
Load the blender: Add 1 cup milk, 1/2 cup rolled oats (soaked or dry), 1 ripe banana, 1 tablespoon nut butter, 1/2 teaspoon cinnamon, 1/2 teaspoon vanilla extract, and a small pinch of salt.
Sweeten if needed: Add 1 pitted date or 1–2 teaspoons maple syrup if you want it sweeter.
If your banana is very ripe, you may not need extra sweetener.
Boost the creaminess: For a thicker smoothie, add 1/4 cup Greek yogurt or a few ice cubes. For an ultra-thick, milkshake-like texture, use a frozen banana.
Blend until smooth: Start low, then increase speed for 30–45 seconds. If it’s too thick, splash in more milk.
If it’s too thin, add a handful of ice or an extra tablespoon of oats.
Taste and adjust: Add more cinnamon or vanilla if you want a stronger “cookie” flavor. If you like raisins in your cookies, pulse in a tablespoon at the end.
Serve: Pour into a chilled glass. Sprinkle a pinch of cinnamon on top, or add a few oat flakes for a cozy finish.