Walnut Coffee Cake (gluten-free)

1 1/2 cups Bob's Red Mill All-Purpose Gluten-Free Flour
1 1/2 teaspoons xanthan gum
3/4 cup organic sugar
2 teaspoons baking powder (check to make sure its gluten-free and aluminum-free)
1/2 tsp salt
1/4 cup canola oil
1 egg
1/2 cup milk

Topping:

3 Tbsp gluten-free flour
1 Tbsp cinnamon
1/8 tsp freshly grated nutmeg
2/3 cup brown sugar
3 Tbsp melted butter
1 cup chopped walnuts
1/4 tsp salt


Put dry ingredients into a large mixing bowl. Whisk or stir together to make sure everything is evenly distributed. Lightly beat egg and then blend in canola oil and milk. Stir wet ingredients into the dry until completely moistened. Combine topping ingredients in a separate bowl. Butter a 9x9 baking dish and pour in batter. Then sprinkle on topping. Bake at 350 degrees for 30 minutes.