Sourdough chocolate chip cookies...Recipe and picture

Good morning family and friends just a quick up date before I post the recipe.. We are having a a major snow Storm coming in now have white out conditions..

4 1/2 cups all pupose flour
2 teaspoons baking soda
1 teaspoon salt
1 cup butter,softened
1 cup vegetable shortening..
1 1/2 cups granulated sugar
1 1/4 cups brown sugar
2 teaspoons vanilla extract
1 cup sourdough starter
4 large eggs
2 (12 ounce)  packages semisweet chocolate chips
1 3/4 cups chopped walnuts
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1. Preheat oven to 375 F
2. In a large bowl combine flour, baking soda and salt, set aside.
3. In a Large mixing bowl,cream the butter, shortening, and sugars until light and fluffy. Add eggs, beating until well blended. Add vanilla and sourdough starter:mixing well. Stir in flour mixture until just mixed. Fold in Chocolate chips and walnuts..
4. Drop by tablespoonfuls 2 inches apart onto baking sheet and bake for 10-12 minutes or until lightly browned. Transfer cookies o wire rack to cool completely. Store in tightly covered container at room temperature.
Makes about 5 dozen cookies..