Heat oven to 350° F (177° C). Lightly grease a small baking dish with butterPro Tip: I use a 4x6-inch baking dish that has a base area of 24 square inches. You can also use a 5x5-inch baking dish with a base area of 25 square inches or a 6x6-inch dish which will yield a spice cake that may bake faster.
In a small bowl, beat butter and brown sugar with an electric mixer until well mixed.
Beat in egg, vegetable oil, and vanilla extract.
In a separate small bowl, whisk together flour, cinnamon, ginger, cloves, nutmeg, baking powder, and salt.
Add the dry ingredients to the butter/egg mixture and mix to combine.
Stir in the milk.
Pour the batter into the baking dish and place the baking dish on a rimmed baking sheet to catch any possible spills.
Bake for 40-45 minutes or until lightly browned and a toothpick inserted in the center comes out clean. Remove and place the baking dish on a rack to cool completely.
