Brew a strong cup of coffee and let it cool for about 15-20 minutes.

Assemble all ingredients: chilled coffee, banana, Greek yogurt, oats, honey or maple syrup, vanilla extract, ice, and milk.

In a blender, combine the chilled coffee, banana, Greek yogurt, and oats. Blend on high for 30-45 seconds until smooth.

Add honey or maple syrup and vanilla extract; blend for another 15-20 seconds.

Add ice and milk, blend on high for 30 seconds until frothy and creamy.

Pour into glasses, garnish with oats or banana slices if desired, and serve immediately.