Preheat the oven to 350 degrees F. Line a baking sheet with parchment paper.
To a small bowl, add the strawberry gelatin mix, 1/4 cup of the flour and 2 Tbsp of the butter. Using a fork, mix together, mashing the mixture down until it is fine and crumbly.
To a separate small bowl, add the remaining 1/4 cup flour and 2 Tbsp butter, along with the sweetener and vanilla. Using a fork, mix together, mashing the mixture down until it is fine and crumbly.
Add the strawberry crumbles to the baking sheet and spread out evenly. Then sprinkle on the vanilla crumbles, ever so slightly mixing them by hand.
Bake for 7 to 8 minutes. Do not stir at all. Remove from the oven and let cool completely (at least 1 hour). If they feel warm, place the baking sheet in the fridge or wait another 30 minutes.
Crumble into an airtight container to store.