Combine the first six ingredients in a medium sized bowl.
In your mixer bowl combine sugar, eggs and extracts. Beat several minutes until light.
On low speed beat in the mayonnaise.
Alternate adding the flour mix and water, starting and ending with the flour. Hold back about 2 Tb. of water. The batter should be thick and fluffy. Add the remaining water if needed.
Spread into two round greased cake pans or one 9 x 13 inch greased pan.
Bake at 350° for 25-30 minutes.
Cool in pans for 10 minutes, then transfer to wire racks.
Recipe by The Gluten-Free Homemaker at http://glutenfreehomemaker.com/silicone-and-chocolate/