Bloom the gelatin by sprinkling unflavored gelatin powder over cold water in a small bowl. Let sit for 5 minutes to hydrate.
Boil hot water and carefully pour over bloomed gelatin, stirring continuously for 2-3 minutes until completely dissolved.
Add vanilla protein powder to the gelatin mixture, whisking thoroughly to eliminate any lumps.
Stir in honey or maple syrup, fresh lemon juice, and vanilla extract, mixing well to distribute all flavoring ingredients evenly.
Pour mixture into serving containers or a 9x13-inch baking dish and allow to cool to room temperature for about 15 minutes.
Refrigerate for at least 4-6 hours, or preferably overnight, until completely set and firm.
Top with fresh berries or preferred toppings just before serving.
Notes
Refrigerate for 4-6 hours or overnight until completely set. Top with fresh berries just before serving. Customize with different protein powder flavors or add agar-agar for vegan option.