If you follow my recipe exactly as instructed, you should wind up with perfectly creamy ice cream. If your ice cream base isn't thick enough, it's possible that you didn't whip the heavy whipping cream for long enough. You need to whip it until stiff peaks form — in other words, the peaks of the whipped cream should stand straight up on your beaters. Also note that this recipe calls for sweetened condensed milk, NOT evaporated milk. If you use evaporated milk, the ice cream will not set up properly.