- These are amazing because of the yeast. Sugar is essential to the success of this recipe. The yeast will eat all of the sugar. I tried with less sugar and they did not rise well. Do NOT use xylitol in the dough, it will stop the action of the yeast. If you are concerned about extra carbs, you can try inulin fiber to feed the yeast instead of sugar… I use sugar because I have it on hand, and it is predictable. Know that the yeast will eat up the majority of the sugar during the proofing and rise. The buttermilk and sugar contribute 1.7 grams of carbs per roll before the action of the yeast if you use 3 tsp, which I found to have the best rise. - I use allulose for the majority of this recipe because it is closest to sugar in flavor and action. You can substitute monkfruit or erythritol in place of the allulose, but they have a greater sweetening power, so you may wish to reduce the volume used. For example in the dough use 3 tbsp of erythritol or monkfruit instead of ¼ cup allulose. In the filling you can use all granulated sweetener, but I liked it best with ½ brown swerve and ½ allulose. All erythritol will crystalize when the pasty cools…