Instructions:

1. Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
2. In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until smooth.
3. Beat in the eggs, one at a time, then stir in the vanilla extract.
4. In a separate bowl, whisk together the flour, baking soda, baking powder, and salt.
5. Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
6. Fold in the chocolate chips and Grandpa’s secret ingredient, if using.
7. Drop rounded tablespoons of cookie dough onto the prepared baking sheet, leaving space between each.
8. Bake in the preheated oven for 10-12 minutes or until the edges are golden but the centers are still soft.
9. Allow the cookies to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.