GFCF Frosted Pumpkin Bars

These frosted pumpkin bars are good - almost like a cake. I've modified the original recipe (from Penzey's Spices). The maple frosting also goes well with Banana Cupcakes.2 cups GF flour blend2 tbsp. flax seed meal2 1/2 tsp. baking powder1 tsp. baking soda1 tsp. xanthan or guar gum1/2 tsp. salt2 tsp. cinnamon1/2 tsp. ground ginger1/2 tsp. ground cloves1/2 tsp. ground nutmeg3 eggs1/2 cup canola