Preheat oven to 350°F (180°C). Line an 8-inch square baking pan with parchment paper, letting excess extend over sides of pan.
In the bowl of a stand mixer fitted with the paddle attachment, beat butter and sugars at medium speed until fluffy, 3 to 4 minutes, stopping to scrape sides of bowl. Add molasses, beating until no streaks remain. Add egg, beating well.
In a large bowl, whisk together flour, cinnamon, ground ginger, salt, baking powder, baking soda, nutmeg, allspice, and cloves. With mixer on low speed, gradually add flour mixture to butter mixture, beating just until combined. Beat in candied ginger. Spread 1¾ cups (about 525 grams) dough in prepared pan. Top with Cheesecake Layer. Crumble remaining dough (about 1 cup [about 300 grams]) on top.
Bake until edges are set, center jiggles just slightly, and an instant-read thermometer inserted in center of Cheesecake Layer registers 175°F (79°C) to 180°F (82°C), 35 to 40 minutes, covering with foil after 30 minutes of baking to prevent excess browning. Let cool completely in pan. Cover and refrigerate for at least 4 hours or up to overnight. Using excess parchment as handles, remove from pan, and cut into bars.
Recipe by Bake from Scratch at https://staging.bakefromscratch.com/december-three-popular-recipes-made-gluten-free/