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Export 7 ingredients for grocery delivery
Step 1
Preheat the oven to 375 degrees F.
Step 2
In a large bowl, beat the butter, the oil, the sugar, and the confectioners' sugar.
Step 3
Beat the eggs into the sugar mixture until well-blended.
Step 4
Beat the vanilla into the egg mixture.
Step 5
Combine the flour, the baking soda, and the cream of tartar in a separate bowl.
Step 6
Gradually add the flour mixture into the egg mixture.
Step 7
Drop the dough in small teaspoon-sized clumps onto ungreased baking sheets.
Step 8
Bake until the cookies are lightly browned, about 8-10 minutes.
Step 9
Transfer the cookies to wire racks to cool.
Step 10
Serve.