Preheat the oven to 350℉. Spray a 9x13 baking pan with cooking spray and then lay parchment paper in it.*I use a pre-cut parchment paper sheet and it fits perfectly inside a 9x13 pan, I lay it vertically across the top to bottom of the pan. You could also just spray the pan and not use parchment paper. In a small mixing bowl, whisk together the all-purpose flour, salt, and baking soda. Set aside for now.
2 cups + 2 tablespoons all-purpose flour, ½ teaspoon sea salt, ½ teaspoon baking soda
In a large mixing bowl, using an electric mixer or stand mixer, beat the melted butter and light brown sugar until it is blended well together, it looks fluffy, and is lighter in color; about 1-2 minutes.
1 cup (2 sticks) salted butter, 1½ cups packed light brown sugar
Add in the eggs, one at a time, blending just until combined after each one. Add the vanilla extract in with the last egg.
2 large eggs, 1 tablespoon vanilla extract
Add the dry ingredients (set aside from earlier) into the wet ingredients and beat on low speed just until combined and no flour pockets remain in the dough.
Mix in the mini chocolate chips just until combined.
1¼ cups miniature semi-sweet chocolate chips
Dump the dough into the prepared baking pan and spread it out evenly.*If wanted, sprinkle some additional mini chocolate chips over top. Bake for 22-26 minutes or until the edges are lightly golden brown, the center is lighter in color but does not look like wet/raw dough, and the top should look wrinkly.
Remove from the oven and let the blondies cool completely, inside the warm baking pan, at room temperature for up to 1 hour.
Cut into squares and enjoy! Blondies are best served immediately and they can be eaten at room temperature or slightly warm (they will still need cooling time so the bars can set and come together).