Lemon Riesling Cake Preston family recipe (Preston winery) 1 pkg. Lemon cake mix 4 Eggs 3/4 cup Oil 1 pkg. Lemon-flavored gelatin (3 oz.) 2 Tbsp Poppyseeds 1 cup Preston White Riesling Grease and flour bundt pan* and preheat oven to 325. Combine above ingredients in a mixing bowl. Fill greased bundt pan and bake for 1 hour. Let cake cool in pan before removing, then dust with powdered sugar. * A muffin pan can also be used.