"Pretty Much a Piece of Heaven" Black Forest Cake

Ingredients (11)

• + 1 (15.25 ounce) package chocolate cake mix add to pantry
• + 1 (3.9 ounce) package instant chocolate pudding mix add to pantry
• + 4 eggs add to pantry
• + ¾ cup water add to pantry
• + ¼ cup vegetable oil add to pantry
• + ½ (6 ounce) jar maraschino cherries, quartered, juice drained and reserved add to pantry
• + 1 (12 ounce) bag chocolate chips add to pantry
• + 1 cup heavy whipping cream add to pantry
• + 2 tablespoons white sugar add to pantry
• + ½ teaspoon cream of tartar add to pantry
• ✓ 1 (12 ounce) can cherry pie filling