Line a pan with parchment paper. Place a large sheet of cling film on your work space, and set out a bowl with water to wet your fingers with. Add a bit of oil to the water.
Mix the sour cream, warm water, active dry yeast, and maple syrup in a small bowl. Cover with a towel and allow this to rest for 7-10 minutes. If the mixture is bubbling, you’re good to go, but if it’s not the yeast is not active and you need to start again.
In a separate bowl mix together the almond flour, flaxseed meal, whey protein powder, sweetener, xanthan gum, baking powder and salt.
Add the eggs, cooled melted butter, and apple cider vinegar to the yeast mixture. Beat with an electric mixture for about a minute or so, then add in the flour. Mix until it forms a sticky dough. Wet a spatula and use this to form the dough into a ball.
Divide the dough into 3 parts. Spread a little oil on the cling film then add 1 part of the dough. Wet your fingers and spread it into a rectangle. Brush with melted butter then sprinkle the cinnamon and erythritol to taste. Leave a 1-inch strip at the top so that you can seal your roll.
Use the cling film to help you roll up the dough towards the empty edge. Seal the edge, then use a sharp knife to cut it into 3 rolls. Wet the blade of the knife to help you cut. Lightly flatten the rolls with the palm of your hand then transfer to the parchment paper. Repeat this step with the other two parts of the dough.
Cover the pan with a kitchen towel, then allow to rise for about an hour. It should double in size. If your kitchen is not warm enough then this may take additional time. If it’s too warm then it may take less time, so keep an eye on it. so.
Preheat oven to 400°F. Cream together all of the glaze ingredients, adjust the thickness with heavy cream if necessary.
Bake until they are a deep golden color. It will take about 20-25 minutes, but remove the tray from the oven about 10 minutes in and cover with tented foil. This will prevent them from browning too much.
Glaze the rolls right when they come out of the oven. If you plan on eating these at a different time then save the glaze for later. They may deflate as they cool. Store in an airtight container, warm to serve.