Good-Cooking - Black Bottom Raspberry Cheesecake

Ingredients

• 1 box brownie mix
• 1/3 cup water
• 3 tablespoons vegetable oil
• 6 eggs
• 1 cup chopped walnuts
• 1 (10 ounce) package frozen raspberries, thawed, drained
• 3/4 cup seedless raspberry jam, divided
• 24 ounces cream cheese at room temperature
• 1 cup granulated sugar
• 1 teaspoon vanilla extract
• 2 tablespoons confectioners' sugar