Deconstructed chocolate & sour cream dessert with cherry

Ingredients

• 130 grams (4.6 ounces) flour
• 130 grams (4.6 ounces) sugar
• 40 grams (1.4 ounces) cocoa
• 0.5 teaspoons baking soda
• 0.5 teaspoons salt
• 1 egg (about 50 grams or 1.8 ounces)
• 1 teaspoon vanilla extract
• 30 grams (1 ounce) vegetable oil
• 30 grams (1 ounce) butter
• 150 grams (5.3 ounces) milk
• 0.5 tablespoons apple vinegar
• 500 grams (17.6 ounces) heavy sour cream
• 4 tablespoons powdered sugar (about 60 grams or 2.1 ounces)
• 1 packet cream thickener (optional, usually about 10 grams or 0.35 ounces)
• 400 grams (14.1 ounces) frozen cherries
• 2 tablespoons cornstarch (about 16 grams or 0.56 ounces)
• 70 grams (2.5 ounces) sugar