Sift together the flour, xanthan gum, baking powder and cinnamon.
In a separate bowl, mix together the egg yolk, oil, pear puree and pear juice.
Mix in the flour mixture and combine together well.
Whisk together the 2 egg whites, until they are stiff and fold them into the batter.
Spoon the mixture into 12 muffin cases.
Bake for 12-15 mins, until firm and light brown.