Place the protein powder, milk, vanilla ice cream, vanilla extract, and ice in a blender and blend until smooth.
Transfer the milkshake into a tall glass and decorate, if desired.
Notes
* Or any protein powder of choice.** I used unsweetened almond milk, but cow's milk will add an extra 6-7 grams of protein, or a protein-enriched milk, like Fairlife, will add 10-11 grams of extra protein. If you want to make the strawberry protein milkshake or chocolate protein milkshake as pictured, make the following swaps-Chocolate protein milkshake: Use chocolate protein powder and add one teaspoon of cocoa powder. Strawberry protein milkshake: Add one cup of fresh or frozen strawberries.TO STORE: Leftovers can be stored in an airtight container for 1-2 days. Give it a stir before serving in case there is any separation. TO FREEZE: Transfer leftovers to an ice cube tray and freeze. Once frozen, store the cubes in freezer-safe containers for up to 3 months. To re-mix, add it to a blender with a splash of milk and blend until smooth.