Creating these incredible Levain-Style Cookies is simple when you follow these steps:

1. Preheat Oven: Begin by preheating your oven to 350°F (175°C). Line a baking sheet with parchment paper.
2. Combine Dry Ingredients: In a medium bowl, whisk together the flour, oats, baking powder, baking soda, and salt until evenly mixed.
3. Mix Wet Ingredients: In a large mixing bowl, beat the softened butter, brown sugar, and granulated sugar until creamy. This should take about 2-3 minutes.
4. Add Egg and Vanilla: Beat in the egg and vanilla extract until well combined.
5. Combine Mixtures: Gradually add the dry ingredients to the wet ingredients, mixing until no floury streaks remain. Avoid overmixing.
6. Fold in Chocolate: Gently fold in the semi-sweet chocolate chips and dark chocolate chunks (if using).
7. Scoop Dough: Using a large cookie scoop or your hands, portion out roughly 1/4 cup of dough for each cookie and place them on the prepared baking sheet, leaving enough space between each cookie to allow for spreading.
8. Bake: Bake in the preheated oven for 12-15 minutes or until the edges are golden brown while the center remains soft.
9. Cool: Remove from the oven and allow the cookies to cool on the baking sheet for 10 minutes before transferring them to a wire rack to cool completely.

This easy-to-follow method will give you perfectly baked Levain-style cookies every time!