Fit piecrust into a 9-inch pieplate according to package directions; fold edges under, and crimp.
Combine pumpkin and remaining ingredients; beat at medium speed with an electric mixer 2 minutes. Pour into piecrust.
Bake at 425° for 15 minutes. Reduce heat to 350°; bake 50 minutes or until a knife inserted in center comes out clean. Cool on wire rack.