Combine butter, lime, jalapeño, garlic and paprika in food processor and pulse process until smooth. Place on waxed paper or plastic and roll to form a log. Place in freezer until ready to serve.
Cook corn by boiling, steaming or grilling. Cut disks of butter and rub onto corn, nesting the butter in a slice of bread to apply it to the hot corn. Season ears with salt, then fight over who gets to eat the hot buttered bread slice!