½ cup (113 grams) unsalted butter, melted and cooled for 10 minutes
¼ cup (55 grams) firmly packed light brown sugar
2 teaspoons (8 grams) Heilala Pure Vanilla Extract
1 large egg (50 grams), room temperature
1⅔ cups (208 grams) all-purpose flour
1 teaspoon (3 grams) cornstarch
½ teaspoon (2.5 grams) baking powder
½ teaspoon (2.5 grams) baking soda
½ teaspoon (1.5 grams) kosher salt
⅓ cup (76 grams) Heilala Vanilla Sugar
Strawberry Jam Frosting (recipe follows)
Instructions
In the bowl of a stand mixer fitted with the paddle attachment, beat granulated sugar, melted butter, brown sugar, and vanilla extract at medium-low speed until well combined, 1 to 2 minutes, stopping to scrape sides of bowl. Add egg, beating until well combined.
In a medium bowl, whisk together flour, cornstarch, baking powder, baking soda, and salt. Add flour mixture to sugar mixture all at once; beat at low speed just until combined, stopping to scrape sides of bowl.
Preheat oven to 350°F (180°C). Line 2 rimmed baking sheets with parchment paper.
Divide dough into 24 portions (about 22 grams each), and shape into balls. Place vanilla sugar in a small shallow bowl. Roll dough balls in vanilla sugar, and place at least 2 inches apart on prepared pans.
Bake until edges are lightly golden and set, 8 to 10 minutes. (Centers may still seem slightly underdone.) Let cool completely on pan on a wire rack.
Place Strawberry Jam Frosting in a large piping bag fitted with a medium open star tip (Wilton 1M); pipe frosting onto flat side of half of cookies. Place remaining cookies, flat side down, on top of frosting. Serve immediately.
Recipe by Bake from Scratch at https://bakefromscratch.com/vanilla-strawberry-sandwich-cookies/