3 tbsp. graham cracker crumbs
1/2 tsp. ground cinnamon
1 1/2 c. buttermilk baking mix
3/4 c. sugar
1/4 c. all purpose flour
1/3 c. butter, melted
1/3 c. dairy sour cream
3 eggs
1 tsp. vanilla

Generously grease 10 cup microwavable ring dish. Mix cracker crumbs and cinnamon; coat dish. Beat remaining ingredients in large bowl on low speed, scraping bowl constantly 30 seconds. Beat on medium speed 4 minutes. Spread in dish. Cover with waxed paper and microwave on medium (50%), rotating dish 1/4 turn every 5 minutes, until top is springy and dry and wooden pick inserted in several places comes out clean, 11 to 15 minutes. Invert on heat proof serving plate; let stand 15 minutes. Remove dish. Serve with fruit if desired. 1 ring cake.