A small pinch each of ground gingercinnamon, & allspice
Optional for garnish: sprinkles
Instructions
Make Dough: Preheat oven to 350°F. Whisk dry ingredients. In a separate bowl, whisk melted butter, sugars, and molasses. Whisk in egg and vanilla. Pour wet mixture into dry and mix until just combined.
Bake: Press dough into a prepared 9x13-inch pan. Bake for 23–26 minutes until the top is set but still soft. Cool in the pan for at least 1 hour.
Make Frosting: Beat cream cheese and butter until smooth. Add sugar, spices, and vanilla. Beat until completely combined and creamy.
Assemble: Spread frosting on the cooled bars. Top with sprinkles, if desired. Refrigerate for 30 minutes before slicing and serving.
Notes
Molasses: Use unsulphured (not blackstrap) molasses for the best flavor.
Under-Baking: Err on the side of under-baking; the bars will set and firm up as they cool.
Storage: Store frosted bars tightly covered in the refrigerator for up to 5 days.