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Steps
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Sequence
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Step
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| 1 | Preheat the oven to 350°F. Lightly grease a 13x9 inch pyrex dish and line it with a parchment paper sling. |
| 2 | In a large bowl, combine the sugars, butter, shortening, salt, vanilla, vinegar, and baking soda, beating until smooth and creamy. |
| 3 | Beat in the egg, again beating until smooth. Scrape the bottom and sides of the bowl with a spatula to make sure everything is thoroughly combined. |
| 4 | Mix in the flour, then the chips. |
| 5 | Use a spoon or rubber spatula to press the cookie dough into the prepared pan. |
| 6 | Bake the cookies for 20-25 minutes, until the edges are chestnut brown and the top is light golden brown. |
| 7 | Label a cooling rack with your period and kitchen and place a large plastic container with the cooling rack so your cookies can be packaged. |
| 8 | Remove the pan cookies from the oven, and cool in the pan prior to cutting. |
| 9 | Store cookies, well wrapped, at room temperature for up to 5 days; freeze for longer storage. |
