Prep the strawberries: Toss sliced strawberries with lemon juice and sweetener. Let sit 10–15 minutes to release juices.
Make the high-protein filling: In a bowl, beat Greek yogurt, cream cheese, vanilla extract, and a pinch of salt until smooth.
Mix in protein powder. Add milk 1 tablespoon at a time until creamy and pudding-like—thick but spoonable.
Stir the crumble: Combine almond flour, crushed cookies, sweetener, salt, and melted butter/oil. It should resemble damp sand that clumps when pressed.
Assemble the cups: In 4 jars or cups, add 2 tablespoons crumble, a generous scoop of protein filling, and a layer of strawberries with some of their juices.
Repeat layers once more.
Finish and chill: Top with a sprinkle of crumble and an optional dollop of whipped topping. Chill 15–30 minutes for best texture.
Serve: Add lemon zest or a drizzle of the berry juice. Spoon and enjoy.