In a small saucepan over medium heat, add the butter, water, erythritol, and vanilla. Stir intermittently until it boils.
Meanwhile, combine the Keto Chow and almond flour, mixing well until there are no clumps.
In a skillet, add enough avocado or coconut oil that it is 1/2 inch deep. Heat on medium.
Once the butter mixture is boiling, remove from heat and add in the dry mixture. Stir until well combined. It should form a ball of dough. Let cool for five minutes and then add the egg. Beat until the egg is completely incorporated.
Add mixture to a piping bag with a large star tip. A Wilton 1M tip works perfectly.
Mix together erythritol and cinnamon in a shallow pan or bowl. Set up an assembly line with your frying pan, paper towels, cinnamon mixture, and then a pan or a plate for your finished churros.
Once your oil is hot, start piping in 3-4 inch strings. You can use scissors to cut the batter. Don’t fry more than 3-4 churros at a time in your pan. Use tongs to flip once the top sides of the dough start to bubble and the bottom looks golden brown. Once flipped, it only takes a minute to finish cooking.
Use a slotted spoon or tongs to remove your churros from the pan and put on paper towels to drain excess oil. Leave them on the paper towel to cool for several minutes (while you continue frying more churros), then place them in the cinnamon mixture and shake them around to coat.
Place your finished churros on a dish or platter and serve warm.