1 1/2 cups all purpose flour
3/4 tsp baking powder
1/4 tsp baking soda
3/4 tsp salt
6 TB unsalted butter, at room temperature
1 cup granulated sugar
1 large egg
1 large egg yolk
2 teaspoons vanilla extract
3/4 buttermilk

Praline Topping:
3/4 cup packed brown sugar
1/2 cup unsalted butter
1/4 cup heavy cream
good pinch of salt
1 tsp vanilla extract
1 cup coarsely chopped walnuts or pecans