Pumpkin puree (which is just plain pumpkin, puréed) is very low in net carbs and calories. 1/2 cup of pumpkin puree has 10g total carbs and 6g net carbs. In fact, each slice of this keto pumpkin pie has only 6.6g net carbs per slice. There’s natural sweetness from the pumpkin, and a bit of added sweetness from low carb friendly sweetener.