Chocolate Sandwich Cookies with Marshmallow Cream Filling

Ingredients

• 1 teaspoon double-acting baking powder 
• 1 teaspoon baking soda 
• 5 tablespoons butter softened
• 0.3 cup light-colored corn syrup 
• 2 large eggs 
• 1 cup buttermilk fat-free
• 9 ounces flour all-purpose
• 2.5 teaspoons gelatin powder unflavored
• 0.1 teaspoon salt 
• 1 teaspoon salt 
• 0.5 cup sugar 
• 1 cup sugar 
• 5 tablespoons cocoa unsweetened
• 0.5 teaspoon vanilla extract 
• 1 teaspoon vanilla extract 
• 0.8 cup water cold divided

Equipment

• bowl
• baking sheet
• sauce pan
• oven
• knife
• whisk
• blender
• measuring cup
• candy thermometer

Directions

1. Preheat oven to 37
2. To prepare cookies, combine 1 cup sugar and butter in a large bowl. Beat with a mixer at medium speed until well blended (about 2 minutes).
3. Add 1 teaspoon vanilla and eggs; beat until combined. Lightly spoon flour into dry measuring cups; level with a knife.
4. Combine flour, cocoa, 1 teaspoon salt, baking powder, and baking soda; stir well with a whisk.
5. Add flour mixture and buttermilk alternately to sugar mixture, beginning and ending with flour mixture.
6. Drop dough by rounded tablespoonfuls 2 inches apart onto baking sheets coated with cooking spray.
7. Bake at 375 for 10 minutes or until set. Cool on pans 5 minutes.
8. Remove from pans; cool completely on wire racks.
9. To prepare filling, sprinkle gelatin over 1/2 cup cold water in a large bowl; set aside.
10. Combine remaining 1/4 cup water, 1/2 cup sugar, syrup, and 1/8 teaspoon salt in a medium saucepan over medium-high heat. Cook, without stirring, until a candy thermometer registers 24
11. Remove from heat. Gradually pour hot sugar syrup into softened gelatin mixture, beating with a mixer at low speed, then at high speed until thick (about 6 minutes), scraping sides of bowl occasionally.
12. Add 1/2 teaspoon vanilla; beat until well blended.
13. Quickly spread about 2 tablespoons filling over bottom side of 1 cookie; top with another cookie. Repeat procedure with remaining filling and cookies.