If only every snack could jiggle its way into the zeitgeist. Tantalize your taste buds with a refreshing buzz from this super popular Japanese jelly dessert.

Bring 1 cup water to a boil in a small saucepan. Add 2 tsp. agar-agar, 1 Tbsp. granulated sugar, and 1 pinch kosher salt, whisking until dissolved.(I’ve also tested this with gelatin, but I ...