Banana Chocolate Chip Bars

1/2 cup (1 stick) butter, softened 
1/3 cup dark brown sugar, firmly packed 
1/3 cup white sugar
1 large egg 
1 teaspoon vanilla 
1 cup sorghum flour 
1/2 cup arrowroot starch
1/2 teaspoon xanthan gum
1/2 teaspoon baking powder 
1/4 teaspoon salt
1/2 teaspoon cinnamon
1/8 teaspoon nutmeg
1 ripe banana, mashed
1 cup semi-sweet chocolate bits 
1 cup chopped walnuts (break apart by hand to preserve the oil)

Preheat oven to 350 degrees. Grease a 9 x 9 baking pan.

Cream butter, sugars, egg, and vanilla, beating until fluffy. In a small bowl, whisk sorghum flour, arrowroot starch, xanthan gum, baking powder, salt, cinnamon, and nutmeg. Add to creamed mixture.

Next, fold in mashed banana, chopped walnuts, and chocolate bits. Spread in pan, and bake at 350 degrees for 25-30 minutes (convection oven: 325 for 25 minutes), or until toothpick at center comes out clean--well, don't count the melted chocolate. Cool; cut into bars. Yield: 16 bars. Freezes well.

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