- Heat oven to 350°F. 
- In 9-inch square pan, melt butter in oven. 
- Sprinkle brown sugar evenly over melted butter. 
- Arrange pineapple slices over brown sugar. Place cherry in center of each pineapple slice. 
- In medium bowl, beat remaining ingredients with electric mixer on low speed 30 seconds, scraping bowl constantly. 
- Beat on high speed 3 minutes, scraping bowl occasionally. 
- Pour batter over pineapple and cherries. 
- Bake 50 to 55 minutes or until toothpick inserted in center comes out clean. 
- Immediately place heatproof serving plate upside down over pan; turn plate and pan over. 
- Leave pan over cake a few minutes so brown sugar mixture can drizzle over cake; remove pan. 
- Serve warm. Store cake loosely covered.