Prep your lemon. Wash and dry it. Use a microplane to zest about 1 teaspoon, then juice half to a whole lemon for 1–2 tablespoons of fresh lemon juice.
Adjust to your taste.
Build the base. Add 1 cup unsweetened almond milk to your blender. Drop in 1/3 cup full-fat Greek yogurt or 2 ounces of softened cream cheese. Both work; yogurt is lighter, cream cheese is richer.
Add protein. Scoop in 1 serving of vanilla or unflavored protein powder.
Choose a brand with low net carbs and no added sugar.
Flavor it up. Add 1–2 tablespoons fresh lemon juice, 1 teaspoon lemon zest, 1/2 teaspoon vanilla extract, and a very small pinch of sea salt.
Sweeten to taste. Start with 1–2 teaspoons of your preferred low-carb sweetener. You can adjust after blending.
Thicken. Add a handful of ice cubes. For an ultra-thick shake, sprinkle in 1/8 teaspoon xanthan gum and/or 1–2 tablespoons heavy cream or coconut cream.
Blend. Start on low, then ramp up to high until silky and frosty, 30–45 seconds.
If it’s too thick, splash in more almond milk. If it’s too thin, add a few more ice cubes.
Taste and tweak. Need more lemon pop? Add another teaspoon of zest or a squeeze of juice.
Want it sweeter? Add a touch more sweetener and blend again.
Serve. Pour into a chilled glass. For a cheesecake moment, top with a dollop of unsweetened whipped cream and a tiny pinch of extra zest.