In a medium-sized bowl, mix together the non-dairy milk with the vinegar (we're making buttermilk). Set aside.
In a large bowl, whisk together the blanched almond flour, tapioca flour, gelatin, xanthan gum, coconut palm sugar, salt, soda, and yeast... all the dry ingredients.
Add the eggs, butter, and vanilla to the milk mixture and mix well. Add the wet ingredients to the dry and stir to combine. The batter will be thick and sticky (it's not like traditional dough). Knead with your hands if necessary. *Note- If the batter is too thick and sticky to work with, you can add a tiny bit more tapioca flour, a few tablespoons at a time, until the dough comes together. However, it should still be fairly soft and sticky.
Scrape/pour batter into plastic wrap and wrap tightly. Place in refrigerator 2 to 3 hours, or until dough is thoroughly chilled and firm enough to roll out. Or it can be left in the fridge overnight.
Tear out a piece of parchment paper that is at least 20 inches long and sprinkle generously with arrowroot or tapioca flour. Cover with plastic wrap and use a rolling pin to roll the dough into a rectangle that is approximately 12 x 18 inches.
In a medium-sized bowl, mix together the filling ingredients. This includes the softened butter, cinnamon, coconut palm sugar, and xanthan gum (if using). Spread evenly over the dough, leaving the bottom inch dry lengthwise. See pictures in the post if needed.
Carefully start rolling the dough tightly making at least 4 or 5 rotations towards the bottom dry part of the dough. You can lift up the parchment paper to help get the dough up and rolling, moving slowly and patching up any cracks as you go. When you come to the end, pinch the bottom edge of the dough into the log so it creates a seal. *Note- If the dough is too sticky to roll up, pop it in the freezer for about 15 minutes, or until firm enough to work with.
Using a very sharp greased knife, cut the log into 8 equal-sized rolls. Cutting them into 8 rolls makes 8 huge rolls, however, you can cut them into 10 to 12 if preferred. If you do this, you will need to slightly reduce the baking time.
Transfer rolls to a large parchment-lined or greased baking dish and slightly press down on each roll.
To rise: Tightly cover the rolls with plastic wrap or aluminum foil and preheat the oven to 150 degrees. When the oven is preheated, turn off the oven, add the rolls, and leave the door cracked. After 30 minutes, close the door to finish rising. Allow to rise for 60 to 90 minutes.
Remove rolls and preheat oven to 350 degrees.
Bake 30 to 35 minutes, or until nicely browned. Rotate after 20 minutes to ensure even baking and check to make sure they're not baking too fast since all ovens are different.
Top with traditional frosting or paleo "cream cheese" frosting (recipes below) and serve hot. Only frost the ones you plan on eating.
Whisk all ingredients in a large mixing bowl. Start with ¼ cup non-dairy milk and add more as needed to thin, however, the frosting should be fairly thick. Pour over hot rolls.
Turn speed to medium-high and blend until smooth. Thin with non-dairy milk as needed. Pour over hot rolls. Unused frosting can be stored covered in the fridge for 2-3 days. Slightly warm before using.
Xanthan gum: While I prefer using xanthan gum, since there are varying thoughts on whether xanthan gum is paleo or not, you can replace it with psyllium husk powder. However, it results in more of a whole-wheat tasting cinnamon roll and the dough can be just a tiny bit harder to roll out. Also, be sure to use psyllium husk POWDER, not whole psyllium husks as they will not work in this recipe. Psyllium can usually be found in the colon cleansing section of health food stores, due to it being so high in fiber.
Almond flour: Unfortunately, almond flour is very unique and the only replacement I know of would be sunflower seed flour, but I've never tested it.
Gelatin: If you can't find unflavored gelatin, you can replace it with pectin. In fact, this recipe originally called for pectin, however, I've found gelatin works a tiny bit better and is easier to find. While it's not a 'make or break' ingredient, it helps to firm up and hold the dough together. Which immensely helps when rolling it up!
Butter: You can replace the butter with dairy-free butter or ghee. If those aren't an option for you, you can replace the butter with a mild-tasting oil such as avocado oil or refined (to reduce the coconut taste) coconut oil. However, I highly recommend using butter, ghee, or a butter substitute! It's a taste you can't achieve with oil.
The dough needs to sit in the fridge for several hours to overnight, so plan ahead!
To make the rolls ahead of time: Fully assemble the rolls and allow them to rise. Then, tightly cover and place in the fridge until ready to bake, up to 2 days. Allow them to set on the countertop while the oven is pre-heating to slightly warm up before baking.
To make paleo powdered sugar: These allulose and monk fruit keto powdered sweeteners (Note- I don't recommend the erythritol or erythritol blends for frostings) are natural and are acceptable on a paleo diet. Or, you can add xylitol to a coffee grinder or very dry blender, along with 1 tablespoon arrowroot or tapioca per cup. Then, blend until powdered. I've tried this method with coconut palm sugar and we didn't really like it, but it could just be our taste buds! I know many people use coconut palm sugar all the time to make powdered sugar 😀
Leftovers can be stored, unfrosted, covered at room temperature 2 to 3 days, or frozen. To freeze, wrap each cinnamon roll in plastic wrap then place in a large freezer-safe baggie. To reheat: Unwrap the rolls and place them in a lined baking dish. Then, loosely tent with foil and heat in a 350-degree oven for 10-15 minutes, or until hot.