1. Combine first 10 ingredients in a large mixing bowl. Beat at low speed of an electric mixer until moistened; beat at medium speed 3 minutes. Spoon batter into a greased and floured 9" x 13" pan. Cover and chill 8 to 12 hours.
2. Combine 1/2 cup brown sugar, pecans, and 1 teaspoon cinnamon; place mixture in an airtight container until you're ready to bake the coffee cake.
3. Preheat the oven to 350°. Sprinkle batter with brown sugar mixture. Bake at 350° for 30 minutes or until a wooden pick inserted in center comes out clean. Serve warm.