Linzer Macaroon Sandwiches

Preparation Preheat oven to 375°F. Line 2 large baking sheets with parchment paper. Finely grind 1 2/3 cups slivered almonds and 1 1/3 cups sugar in processor. Add egg whites and almond extract; process until well blended (dough will be sticky). Using slightly rounded teaspoonful for each cookie, roll dough between damp palms of hands into balls. Place on prepared baking sheets, spacing 1 inch apart. Flatten each ball slightly to 1 1/4-inch-diameter round. Gently press a few sliced almonds into each cookie. Bake cookies until light golden, about 18 minutes. Slide parchment with cookies onto racks; cool completely. Stir preserves and 2 tablespoons water in heavy small saucepan over medium-high heat until mixture boils. Reduce heat and simmer until mixture thickens slightly, about 4 minutes. Spoon 1/2 teaspoon raspberry preserves onto flat side of 1 cookie. Top with second cookie, flat side down. Press to adhere. Repeat with remaining cookies and preserves. (Can be prepared ahead. Store in airtight container at room temperature up to 1 week or freeze up to 1 month. Cookies may soften slightly.) Sift powdered sugar over cookies.

Preparation Preheat oven to 375°F. Line 2 large baking sheets with parchment paper. Finely grind 1 2/3 cups slivered almonds and 1 1/3 cups sugar in processor. Add egg whites and almond extract; process until well blended (dough will be sticky). Using slightly rounded teaspoonful for each cookie, roll dough between damp palms of hands into balls. Place on prepared baking sheets, spacing 1 inch apart. Flatten each ball slightly to 1 1/4-inch-diameter round. Gently press a few sliced almonds into each cookie. Bake cookies until light golden, about 18 minutes. Slide parchment with cookies onto racks; cool completely. Stir preserves and 2 tablespoons water in heavy small saucepan over medium-high heat until mixture boils. Reduce heat and simmer until mixture thickens slightly, about 4 minutes. Spoon 1/2 teaspoon raspberry preserves onto flat side of 1 cookie. Top with second cookie, flat side down. Press to adhere. Repeat with remaining cookies and preserves. (Can be prepared ahead. Store in airtight container at room temperature up to 1 week or freeze up to 1 month. Cookies may soften slightly.) Sift powdered sugar over cookies.