Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a medium bowl, whisk together the flour, baking soda, and salt. Set aside.
In a large bowl, cream the butter and sugar together using an electric mixer until light and fluffy, about 3 minutes.
Add the egg and almond extract to the butter mixture and mix until fully incorporated.
Gradually add the dry ingredients to the wet mixture, mixing until just combined. Add the milk and stir until smooth.
Scoop tablespoon-sized portions of dough and roll them into balls. Place them on the prepared baking sheet, spacing them about 2 inches apart.
Flatten each cookie slightly with the back of a spoon or your fingers. If desired, sprinkle a few sliced almonds on top of each cookie for garnish.
Bake for 8-10 minutes, or until the edges are lightly golden. Be careful not to overbake for that soft, chewy texture!
Let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.