Brew and chill the coffee. Make a cup the night before and refrigerate, or use cold brew for smoother flavor. Cold coffee prevents the shake from tasting watered down.
Add liquids to the blender first. Pour in the coffee and milk.
Starting with liquids helps the blades catch everything smoothly.
Add protein and flavor boosters. Scoop in the protein powder, vanilla extract, and any cinnamon or cocoa. Add a tiny pinch of salt if you like a café-style flavor pop.
Blend with fruit and ice. Add the frozen banana and ice. Blend on high for 30–45 seconds until velvety.
If it’s too thick, splash in more milk; too thin, add a few ice cubes.
Taste and sweeten. Try a sip. Add maple syrup, honey, or your preferred sweetener to balance the coffee flavor, then blend again for 5–10 seconds.
Serve immediately. Pour into a chilled glass or an insulated travel cup. Top with a dusting of cinnamon or cocoa if you’re feeling fancy.