Blackberry Jam Cake | Kowalski's Markets

Ingredients

• 3 ½ cups fresh or frozen blackberries (about 20 oz. fresh berries)
• 2 cups sugar
• divided
• 1 tbsp. Kowalski's Freshly Squeezed Lemon Juice (from the Produce Department)
• 9 oz. jar Kowalski's Black Raspberry Jam
• - baking spray
• as needed
• for greasing the pan
• 1 cup canola oil
• 3 eggs
• ½ cup sour cream
• 1 tbsp. plus 1 tsp. Kowalski's Organic Madagascar Vanilla Extract
• 3 cups flour
• 1 ½ tsp. baking powder
• 1 tsp. kosher salt
• ½ tsp. baking soda
• 1 cup whole milk
• 16 oz. Kowalski's Signature Classic Buttercream Frosting (from the Bakery Department)
• at room temperature
• 6 oz. white chocolate
• melted and cooled