Start by assembling all your ingredients. Having everything ready makes the process smoother. Trust me; a chaotic kitchen leads to forgotten ingredients and frustration.
Preheat your oven to 350°F (175°C). I can’t stress this enough. Starting with a hot oven is key to perfect cookies. It helps them rise and turn golden brown.
In a large bowl, beat the two sticks of room-temperature unsalted butter and granulated sugar together. Use a hand mixer or stand mixer on medium speed for about 3-4 minutes. You want a light, fluffy texture. This creates small air pockets that help the cookies stay soft and chewy.
Next, add in the eggs, vanilla extract, lemon zest, and lemon juice. Beat these in until fully combined. The mixture should look creamy and light. You’ll catch a hint of lemon scent wafting through the air. It’s divine!
In another bowl, whisk together the flour, baking soda, baking powder, fine sea salt, and ground cinnamon. Make sure all these dry ingredients are well combined to avoid clumps in your batter.
Gradually add the dry mixture to the wet ingredients. Mix slowly until just combined. Don’t over-mix here; we just want everything incorporated.
Gently fold in those beautiful blueberries and finely chopped pecans or walnuts using a spatula. This step is crucial. You want to ensure even distribution without smashing the berries.
Using a cookie scoop or tablespoon, drop your cookie dough onto a prepared baking sheet lined with parchment paper. Leave some space between each scoop, as the cookies will spread during baking.
Pop the sheet into the preheated oven and bake for 12-15 minutes. The edges should be golden, and the centers may look slightly underbaked. That’s okay! They’ll continue to cook on the baking sheet after being removed from the oven.
Let the cookies cool on the baking sheet for about 5 minutes before transferring them to a wire rack. This cooling period allows them to firm up while still warm.