2 2/3 cups flour
2 cups sugar
1/2 cup butter, softened
1/2 cup vegetable or canola oil
1 cup water
2 eggs
2 teaspoons vanilla
1 teaspoon cinnamon (can use more if desired)
1 1/2 teaspoons baking soda
2/3 cup buttermilk (substitute: 1 cup milk + 1 tsp lemon juice or vinegar; let sit 10 minutes)

Frosting (opt; I make a whipped cream frosting)
1/2 cup butter, softened
1 teaspoon vanilla
1 (8 ounce) package cream cheese, softened
2 cups sifted powdered sugar (icing)