Marshmallow Cookie Sandwiches

Coat a 9-inch square bakingpan with cooking spray; line withparchment. Sprinkle gelatin over1/3 cup water in the bowl of a mixer;let stand for 5 minutes.

Heat granulated sugar, cornsyrup, remaining 1/3 cup water, and1/8 teaspoon salt in a saucepan overmedium-high heat, stirring occasionally,until syrup reaches 238 degrees on acandy thermometer, about 5 minutes.

Whisk gelatin in mixer on lowspeed, adding syrup in a slow, steadystream down side of bowl. Whisk,gradually increasing speed to high,until almost tripled in volume,about 8 minutes. Whisk in vanilla.Transfer to baking pan. Smooth top.Let stand until set, at least 3 hours.

Cut out nine 2 1/2-inch squaremarshmallowsusing a cookie cutteror a knife dipped in confectioners'sugar. Dip surface of crackers intochocolate to coat, and transferto parchment-lined baking sheets.Refrigerate until set, about 10 minutes.Sandwich marshmallowsbetween crackers, chocolate sides in.

Dip half of each sandwich intochocolate, on the diagonal; sprinklewith peanuts, and transfer to aparchment-lined baking sheet. Refrigerateuntil set, about 10 minutes.