1Heat oven to 350°F. In 9-inch round or 8-inch square pan, melt butter in oven. Sprinkle 1/4 cup brown sugar evenly over melted butter. Arrange pear slices in single layer on sugar mixture; sprinkle with pecans.
2In medium bowl, beat remaining ingredients except whipped cream with electric mixer on low speed 30 seconds, scraping bowl constantly. Beat on medium speed 4 minutes, scraping bowl occasionally. Pour batter over pear slices and pecans.
3Bake 35 to 40 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. Cool at least 10 minutes before serving. Serve warm with whipped cream. Store cake loosely covered.