Chill your coffee: Brew coffee ahead of time and refrigerate, or use cold brew. Cold coffee keeps the shake creamy and prevents melting.
Load the blender: Add cold coffee, milk, protein powder, frozen banana, vanilla extract, and any optional add-ins like oats or cinnamon.
Blend until smooth: Start on low, then increase to high for 20–30 seconds.
Add ice if you want a thicker, frostier texture.
Taste and adjust: Sip a little. If you want it sweeter, add maple syrup or honey. For a stronger coffee note, add a splash more brewed coffee.
Serve right away: Pour into a chilled glass or a to-go cup.
Top with a sprinkle of cinnamon or cocoa powder if you like.