01 -
Lightly oil a 9x13-inch pan. Whisk powdered sugar, cornstarch, and 2 tablespoons strawberry powder, then dust the pan generously with the mixture.
02 -
Simmer strawberries and lemon juice in a small saucepan over medium heat for 8-10 minutes, mashing as they soften, until reduced to about 1/2 cup. Blend or mash smooth, then cool to room temperature.
03 -
Add the cooled strawberry puree and 1/2 cup cold water to the bowl of a stand mixer. Sprinkle gelatin evenly over the top and let it bloom for 10 minutes.
04 -
Combine sugar, corn syrup, 1/2 cup water, and salt in a saucepan. Bring to a boil over medium-high heat and cook without stirring until a candy thermometer reaches 240°F.
05 -
With the mixer on low, slowly pour the hot syrup into the bloomed gelatin. Increase to high and whip for 10-12 minutes, until thick, glossy, and pale pink.
06 -
Beat in vanilla and 1/3 cup strawberry powder during the last minute of whipping. Scrape the mixture into the prepared pan, smooth the top, and dust with more coating. Let set uncovered for at least 6 hours or overnight.
07 -
Turn the slab onto a coated surface. Cut into squares with an oiled knife or kitchen shears, then toss every side in the coating mixture. Store airtight at room temperature.