Line the bottom of a 9" springform pan with parchment paper and spray the sides with non-stick spray. Wrap pan bottom and up sides with foil. This will keep any drips from happening during baking. Set aside.
Add the almond flour, coconut flour, baking powder, xanthan powder, 2 tsp of the cinnamon, and sea salt in a medium size bowl. Whisk together.
Add flour mixture to milk mixture and mix well. Continue to cook and stir until it begins to form a dough and pull away from the sides of the pan. Remove from heat and allow to cool for 10 minutes.
Once cooled, stir in the whisked eggs and vanilla.
Scoop mixture into the springform pan and spread evenly across bottom.
Place springform pan into preheated oven and bake for 5 minutes. Reduce heat to 325 F and continue baking for 15 minutes. Remove from oven.
Place a pan of water on the bottom rack of 325 F preheated oven.
In bowl of stand mixer, add the cream cheese, Swerve, Swerve Brown, vanilla, pumpkin spice extract, pumpkin pie spice, cinnamon, and sea salt. Mix on medium until well blended and creamy but don't over mix. It could cause cracks in the cheesecake if too many air bubbles are present.
Add in the whisked eggs and mix just until combined.
Turn off oven and leave cheesecake in oven for 1 hour.
Place medium sized metal or glass bowl, the whisk attachment of the mixer, and the heavy whipping cream in the freezer for at least 15 minutes.
Remove from freezer and beat cream, cream of tarter, and cinnamon until soft peaks form. Add in the vanilla, mascarpone cheese and Swerve. Beat until stiff peaks form.
Make sure all cheesecake ingredients (cream cheese, sour cream, and eggs) are room temperature. It will make blending easier and batter smoother.
Don't over mix cheesecake batter or cheesecake may crack when baking.
Placing a pan of water on the rack below cheesecake will keep it moist and help prevent cracking.
Don't be tempted to open oven. Temperature changes can also cause surface cracking.