2 medium pineapples, peeled, cored, and cubed (about 2¼ pounds)
1 cinnamon stick
½ teaspoon (1 gram) whole cloves
½ cup (100 grams) granulated sugar
1 tablespoon (15 grams) fresh lemon juice
Instructions
Preheat oven to 350°F (180°C). Line baking sheets with parchment paper.
In the bowl of a stand mixer fitted with the paddle attachment, beat butter and sugar at medium speed until creamy, 2 to 3 minutes, stopping to scrape sides of bowl. Add egg, beating well. Beat in fresh ginger and vanilla.
In a medium bowl, whisk together flour, ground ginger, salt, and baking powder. With mixer on low speed, gradually add flour mixture to butter mixture, beating until combined.
Transfer about ½ cup dough to a pastry bag fitted with an open star tip (Wilton 1M). Pipe 1½-inch rosettes 3 inches apart on prepared pans, pinching dough with fingers to release. (Spacing these cookies farther apart ensures even heating during baking for better shape.) Repeat with remaining dough, ½ cup at a time.
Bake for 5 minutes. Remove from oven; using the handle of a wooden spoon, gently make an indentation in center of each cookie. Top with Pineapple Jam Filling balls. Bake until cookies are light golden, 6 to 8 minutes more. Let cool on pans for 10 minutes. Remove from pans, and let cool completely on wire racks.
Pineapple Jam Filling
In the work bowl of a food processor, place pineapple; pulse until puréed. Transfer pineapple purée to a large skillet. Add cinnamon stick and cloves; cook over medium heat, stirring frequently, until most of liquid is evaporated, about 15 minutes. Stir in sugar and lemon juice; increase heat to medium-high. Bring to a boil; cook for 5 minutes, stirring frequently to reduce spattering. Reduce heat; simmer, stirring frequently to prevent scorching, until thick and golden in color, about 40 minutes.
Transfer pineapple mixture to a bowl. Let cool for 30 minutes. Remove cinnamon stick and cloves. Cover and refrigerate for at least 1 hour.
Line a baking sheet with parchment paper. Scoop pineapple mixture by teaspoonfuls (about 7 grams), and shape into balls. Place on prepared pan until ready to use.
Recipe by Bake from Scratch at https://staging.bakefromscratch.com/pineapple-ginger-thumbprint-cookies/