Cinnamon Buns Gluten-free

I adapted this recipe from a recipe I found online. You can find the original here.
These cinnamon buns are delicious and I have non-Celiac people ask for them.

Cinnamon Buns

Proof....until foamy
1 cup luke-warm milk
1 tsp sugar
1 1/2 tbsp instant yeast

In heavy duty mixer bowl beat....
2 tbsp. butter
2 tbsp. oil
1/4 cup sugar
1 egg
2 tsp. vanilla

Add proofed yeast liquid .... mix then add all at once the following dry ingredients....

1/4 cup white bean flour (you can use a coffee grinder to grind your own small white bean flour..use a fine sieve .... you will have to grind several times to get nice fine flour, but it is very doable)
1/4 potato starch
1/2 cup tapioca starch
1/2 cup cornstarch
1/4 tsp baking soda
2 tsp baking powder
1 tsp xanthan gum
1 tsp guar gun
1/2 tsp salt

Mix on low speed until dry ingredients are moistened then beat on high for a couple of minutes until dough is smooth and elastic.

Tape plastic wrap onto your counter or cutting board..... Sprinkle with Sweet Rice Flour...
Turn dough onto the plastic wrap.
Cover with plastic wrap and roll dough into a rectangle about 15" by 10"
Remove top plastic wrap and sprinkle dough with cinnamon ... and about 1 cup of brown sugar. (optional - add raisins and/or nuts)

Using the bottom wrap to help, roll up the dough lengthwise, sealing edges.

Cut roll into 10 - 1 1/2" slices and place them in a large round pie plate.

Cover with cloth or towelling and let rise for about 40 minutes.

Bake at 375' for 30 minutes or until tops are nicely browned.

Remove from oven and cover the rolls with icing.
I cup icing sugar,
1 tsp butter
1 tsp vanilla
milk to make thick consistency

Enjoy warm... or cool.