Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.
Cream butter, brown sugar, and granulated sugar until fluffy.
Mix in espresso powder, eggs, and vanilla until smooth.
In a separate bowl, whisk flour, baking soda, and salt.
Gradually add dry ingredients to the wet mixture, stirring well.
Fold in oats and chocolate chips.
Scoop dough into 1-inch balls and place 2 inches apart on the baking sheet.
Bake for 10-12 minutes, until edges turn golden.
Cool on the sheet for 5 minutes, then transfer to a wire rack.
Eat immediately or pretend you’ll share later.