Cake Ingredients:
1 cup flour
1/2 teaspoon baking soda
3/4 cup sugar
dash salt
1/4 cup (1/2 stick) butter
1/4 cup vegetable oil
2 tablespoons cocoa powder
1/2 cup water
1/4 cup buttermilk
1 egg
1/2 teaspoon vanilla

Frosting Ingredients:
1/4 cup (1/2 stick) butter
2 tablespoons cocoa
3-4 tablespoons milk (as needed for consistency)
1/2 cup pecans, chopped
2 cups powdered sugar
1/2 teaspoon vanilla

Coconut Cream Filling Ingredients:
1/2 of a 14-ounce can unsweetened coconut milk
3/8 cup sugar
1 teaspoon vanilla extract
pinch kosher salt
2 large egg yolks
1 tablespoon corn starch
1 tablespoon unsalted butter
1/2 cup sweetened coconut flakes
1/4 cup whipping cream
extra whipping cream
toasted coconut (optional)