Hi Jack, So happy to find another sourdough fan. I make bread every week simply because my children won't eat store bought bread now, but I don't mind it is rewarding to see my husband & them enjoy so much. I can't wait to try your recipe it sounds great.

Here is a very simple and quick sourdough Coffee Cake recipe. I use the starter which has instant potatoes in it, but I imagine any would be fine.

1 cup sourdough starter
1 cup plain flour
3/4 tsp. soda
1 egg
1/2 cup oil
1-1/2 tsp. vanilla
1/2 cup sugar

MIX all ingredients together well. Pour into 8x10-inch pyrex baking dish sprayed with cooking spray.

TOPPING:
1/2 cup chopped nuts (I use pecans)
1/2 cup brown sugar
1 tsp. cinnamon
1 tsp. flour
1/2 stick butter (melted)

Mix until crumbly; sprinkle on cake. Bake at 350 for 30 min.

*Note: The great thing about this is you don't have to set out to reach room temp., although it can be made after feeding step as you would bread. I also double the topping and add butter flavoring to the cake mixture. But, it is fine as it reads.