Everyone who tries this moist and flavorful Pumpkin Cake falls in love with it!
In large bowl, beat cake mix, pumpkin, water, vegetable oil, eggs and pumpkin pie spice with electric mixer on low speed 1 minute, scraping bowl constantly. Increase speed to medium; beat 2 minutes. (This can also be done by hand with a whisk)
Pour batter into slow cooker; cover and cook on HIGH 1 hour 45 minutes or until toothpick inserted in the center comes out clean.
Uncover and cool 10 minutes. (Make sure slow cooker is off) Run a knife around the edge to loosen; turn out onto a cooling rack and cool completely.
With hand held mixer on low, gradually add in confectioners sugar, 1 cup at a time, until smooth and spreadable.