Chia seed eggs work surprisingly well in chocolate chip cookies because they add a slight nuttiness and depth of flavor while keeping the cookies soft and chewy.
Preheat the oven to 350°F. Line a baking sheet with parchment paper or lightly grease it.
Make the chia egg: Mix 1 tablespoon of chia seeds with 3 tablespoons of water in a small bowl. Let it sit for about 5 minutes until it forms a gel-like consistency.
Cream butter and sugars: In a large mixing bowl, beat ½ cup softened butter, ½ cup sugar, and ¼ cup brown sugar until light and fluffy.
Add wet ingredients: Stir in 1 teaspoon vanilla and the chia egg until well combined.
Combine dry ingredients: Whisk together 1 cup flour, ½ teaspoon baking soda, and ½ teaspoon salt in a separate bowl.
Mix everything: Gradually add the dry and wet ingredients, stirring until combined.
Fold chocolate chips into the mixture: Gently mix in 1 cup of chocolate chips.
Drop spoonfuls of cookie dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 10-12 minutes or until the edges are lightly golden.
Let the cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.