Eastern sweets - Pound cake with cinnamon filling

Ingredients:

3 cups of flour

3 teaspoons baking powder

6 vanilla eggs

1 and 1/2 cups of butter

2 cups of sugar

Filling:

1 tablespoon of cinnamon

1/4 cup brown sugar

1/2 cup of crushed walnuts

For the face:

1/2 cup of crushed walnuts

1/4 cup brown sugar

1 teaspoon cinnamon