Preparation: In a large bowl, beat the butter with the granulated sugar, brown sugar, and orange zest until creamy.
Incorporating liquids: Add the egg and yolk along with the vanilla and beat until fully combined.
Adding the dry ingredients: In the same bowl, add the flour, salt, baking soda, baking powder and chopped blueberries. Stir in with a spatula until well combined.
Chilling: Cover the dough with plastic wrap and refrigerate for at least 3 hours.
Preheat the oven to 350°F (175°C).
Forming cookies: Line a baking sheet with parchment paper and place dough balls using a #20 scoop, leaving space between them.
Baking: Bake for 12 minutes or until the edges are golden brown.
Cooling: Let the cookies rest on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.
Notes
Use high-quality butter: Good-quality butter enhances the flavor and texture of the cookies. Avoid margarine or substitutes with high water content.
Measure the flour correctly: To prevent dry cookies, use the spoon and level method instead of packing the flour into the measuring cup.
Don't skip the orange zest: It adds a citrusy aroma and flavor that balances the sweetness of the cookies. Use only the orange part of the peel, avoiding the white part to prevent bitterness.
Do not overmix the dough: Once the flour is added, mix just until combined to avoid tough or dense cookies.
Chill the dough for the recommended time: This helps the cookies hold their shape and improves texture. If in a hurry, chill for at least 1 hour.
Use a scoop for uniformity: A #20 scoop helps ensure cookies are the same size, leading to even baking.
Bake until the edges are golden: Don't wait for the cookies to look fully set in the oven, as they will continue cooking from residual heat.
Let them cool before moving: Wait 5 minutes on the baking sheet before transferring them to a cooling rack to prevent breaking.
Store properly: Keep cookies in an airtight container at room temperature for up to 5 days or freeze the dough in portions for later baking.