Dump the softened cream cheese, heavy cream, shredded cheddar, sugar, and spices into a 2-4 quart slow cooker and stir to combine. Add the butter and corn and stir again.
Cover and cook on low for 3 hours, stirring halfway through.
Stir well before serving, and refrigerate any leftovers.
Notes
You don’t need to thaw the corn.
If you want to make it ahead, leave the slow cooker on the warm setting for 2 hours before serving. Stir again before serving.
Substitute canned or fresh corn kernels. Use 3 ½ 15.25-ounce cans of sweet corn, drained. Or cut the kernels off of 10 ears of corn.