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| unsalted butter: 1 cup (room temperature) |
| vegetable oil: 1 cup |
| granulated sugar: 1 cup |
| powdered sugar (unsifted): 1 cup |
| eggs: 2 |
| vanilla extract: 1 tsp |
| all-purpose flour (unsifted): 4 1/2 cups |
| baking soda: 1 tsp |
| cream of tartar: 1 tsp |
Credit: AllRecipes
"These easy-to-make cookies simply melt in your mouth! I've passed the recipe around to many friends. After I gave the recipe to my sister, she entered the cookies in a local fair and won the 'best of show' prize!"