I made sourdough coffeecake yesterday and it was delicious! The whole family ate it up. It was also very easy to make. Here is my recipe:
1 cup proofed starter (see link below on how to proof your starter)
1/3 cup olive oil
1 slightly beaten egg
1 cup whole wheat pastry flour
¾ cup cane juice crystals or sugar
1t baking soda
1 t cinnamon
½ t salt
½ cup Sucanat or brown sugar
1T whole wheat flour
In a mixer combine proofed starter, olive oil, and egg. Mix to combine. Add flour, cane juice crystals (or sugar), baking soda, cinnamon and salt. Mix again to combine all ingredients.
Spray a 9 inch square pan with non stick spray. Pour batter into pan. Set aside while you make the topping.
To make topping combine first 3 ingredients in a small bowl. Cut in butter with a pastry blender or your clean hands.
Spread topping over cake batter.
Bake at 350 for 35 minutes.
You can find information on making sourdough starter and how to proof your starter here: http://www.thefamilyhomestead.com/sourdoughstarter.htm