Preheat oven to 350ºF.
In a large bowl using an electric mixer cream brown sugar and butter until light and fluffy. Stir in 1-1/2 cup flour, oats and baking soda; mix until crumbs form. Press half of crumb mixture into bottom of a 9x13” baking pan. Bake for 10 minutes. Remove and set aside (Crust will be partially baked)
In a small bowl, combine ¾ cup sugar, ½ cup flour, orange peel, almond extract and sour cream; mix well. Stir in cherries.
Pour mixture over crust. Crumble and sprinkle remaining half of crumb mixture over filling.
Bake for 25-35 minutes or until center is set. Cool for an hour or completely before cutting into bars and serving.