INGREDIENTS
[Cake]
Nonstick vegetable oil spray
1 ½ cup all-purpose flour
1 tsp ground ginger
¾ tsp ground cinnamon
¾ tsp kosher salt
½ tsp baking powder
½ tsp baking soda
½ cup (1 stick) unsalted butter, cut into 1/2" pieces
½ cup (packed) light brown sugar
½ cup mild-flavored (light) molasses
1 Lrg egg, beaten to blend
2 tsp grated peeled ginger
[Topping]
1 cup chilled heavy cream
1 Tbsp powdered sugar
¼ cup store-bought lemon curd
Finely grated lemon zest
[Special equipment]
An 8" square metal cake pan