Preheat your oven to 350°F (175°C) and let it get nice and toasty.
In a large bowl, mix together the flour, sugar, cocoa powder, baking soda, baking powder, and salt. If you have a flour sifter, this is the perfect moment to use it—your batter will thank you later!
In another mixing bowl, beat together the oil, eggs, buttermilk, orange zest, orange juice, and orange extract for about a minute until everything is smooth and happy.
Now, gently stir the dry ingredients into the wet mixture until just combined. Pour in the hot water and mix again—the batter will look thin, but that’s exactly what you want! It means your cake will come out extra moist and delicious.
Spray two 9-inch or three 8-inch cake pans with nonstick cooking spray. Divide the batter evenly between the pans.
Bake for 25 to 27 minutes, or until a toothpick poked in the center comes out clean. Let the cakes cool completely before adding your favorite frosting!