In a small saucepan, mix 1/4 cup water with agar-agar powder. Let it sit for 5 minutes to bloom.

Heat the mixture over medium heat, stirring constantly, until fully dissolved (about 2–3 minutes).

Add remaining 1/4 cup water, sugar, and dandelion honey. Bring to a gentle boil, then reduce to a simmer for 4–5 minutes, stirring frequently.

Remove from heat and stir in vanilla extract.

Using a hand or stand mixer, beat the mixture for 8–10 minutes until thick, glossy, and slightly increased in volume.

Pour into a greased or parchment-lined baking dish and smooth the top.

Let it set at room temperature for about 1 hour.

Dust with powdered sugar, slice into squares, and roll edges in more powdered sugar to prevent sticking.