Homemade Chocolate Poke Cake

Name: Homemade Chocolate Poke Cake
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Cuisine: American
Ingredients: 1/2 cup unsalted butter (room temperature); 1/2 cup vegetable oil; 1 cup brown sugar (packed); 1 cup white sugar; 2 eggs; 1 teaspoon vanilla; 3/4 cup unsweetened cocoa powder (sifted); 1 cup buttermilk; 1 cup plain prepared (hot coffee or hot water); 2 cups all-purpose flour (sifted); 1 teaspoon salt; 1 teaspoon baking powder; 2 teaspoons baking soda; 1 cup semi-sweet chocolate chips; 14 oz sweetened condensed milk; 1 cup heavy whipping cream; 1/4 cup cocoa powder (sifted); 1/2 cup powdered sugar (sifted); 1/2 teaspoon vanilla extract; 1 cup mini chocolate chips (garnish)