If you’re looking for something fast, easy, and intensely chocolatey, this should work:
Chocolate Cherry Cake
1 can (21 oz) cherry pie filling
1 1/2 Tbsp vegetable oil
1 box dark chocolate cake mix
Beat together eggs and pie filling. Mix in dry cake mix and oil. Spread batter in a greased and floured 11 x 15" or 13 x 9" pan. Bake at 350 degrees F for 25-35 minutes.
Top with Chocolate Ganache
1 cup cream
8 oz semisweet chocolate, finely chopped
Heat cream in a heavy-bottomed saucepan to just under a boil. Add chocolate, and over very low heat, constantly stirring, cook until completely smooth. Cool, stirring, occasionally, until thickened and spreadable (can take several hours). To cool faster, place saucepan in ice water and gently stir until thickened.
Make up to 3 days before, refrigerate, and bring to room temp before using.
Or you could try Chocolate Gooey Butter Cake
(I’m not sure if I’ve tried this recipe, but it looks good)
8 ounces soft whipped cream cheese, at room temperature
3 ounces bittersweet chocolate, melted
One 1-pound box confectioners’ sugar, sifted
1 1/2 cups all-purpose flour
1 cup sugar
1/4 cup cocoa powder
1/2 teaspoon salt
2 teaspoons baking powder
1 stick butter, melted
1/2 cup milk
1 teaspoon vanilla extract
Preheat the oven to 350 degrees F. Butter a 9-by-13-inch cake pan.
Prepare the topping first. Whip together the cream cheese, melted chocolate and egg. When smooth, stir in the sifted confectioners’ sugar. Set aside.
To make the cake, mix the dry ingredients, preferably in the bowl of a mixer.
In another bowl, stir together the melted butter, eggs, milk and vanilla. Slowly add the liquid ingredients to the dry ingredients; beat for 3 minutes. Pour the batter into the prepared cake pan. Gently spread the cream cheese topping over the cake. Bake in a 350-degree F oven for 40 minutes. Cool the cake completely, at least 4 hours, before cutting. The cake will stay moist and delicious for 3 days. Makes 8 to 10 servings.
If neither one of those looks good, I have an easy recipe for a mud cake, but it’s very sugary, and it’s not for everyone (chocolate cake with a marshmallow/brown sugar topping).