Preheat your oven to 375 degrees Fahrenheit.
Grease, or line with parchment, some cookie sheets.
3/4 cup(1-1/2 sticks) unsalted butter, softened
2/3 cup packed brown sugar
2/3 cup sugar
2 Tablespoons light corn syrup
1 Tablespoon cider or white vinegar
1 Tablespoon vanilla extract
1/2 teaspoon salt
1/2 teaspoon baking powder
1/4 teaspoon baking soda
2-1/4 cups flour
3 cups semi-sweet chocolate chips
In a large bowl, cream together the butter, sugars, corn syrup, and vinegar.
Beat in the eggs.
Mix in the vanilla extract, salt, baking powder, and baking soda.
Stir in the flour, than the chocolate chips.
With a tablespoon or medium cookie scoop, drop cookies on the cookie sheets.
Bake for 10 minutes, just til set. The centers may look soft.
Take them out of the oven and remove to racks to cool.
Makes about 4 dozen cookies.