Beat first 3 ingredients with mixer until blended.
Pour into 13x9-inch pan sprayed with cooking spray.
Bake 35 min. or until toothpick inserted in center comes out clean. Immediately poke deep holes in cake at 1-inch intervals, using handle of wooden spoon.
Beat pudding mixes and milk in large bowl with whisk 2 min.; pour half into holes in warm cake.
Let remaining pudding stand until slightly thickened.