Preheat oven to 350. Lightly grease a 9″ pan.

Mix brown sugar, flour and softened butter together in a medium bowl. I use a fork to cut the butter into the flour and sugar. Pat 2 cups of this mixture into the pan.

To the remaining two cups of flour mixture in the bowl, add 1 egg and mix well.

Stir 1 t baking soda into the 1 c of sour cream. Mix that into the bowl with the flour-egg mixture. Stir well to incorporate. Spread half of this over the “crust”.

Now add your choice of berries or chocolate. Top that with the rest of the batter.

Streusel Topping:

Make streusel by combining all ingredients in a bowl. Spoon over batter and press it in a bit. Bake 50-60 minutes or until it doesn’t jiggle and a skewer comes out clean.

Drizzle with melted jam or sprinkle with powdered sugar if desired.