Preheat the oven to 350°F and line a baking sheet with parchment. No one likes a sticky mess.
Whisk together flour, espresso powder, baking soda, and salt. Keep it smooth.
Beat butter, brown sugar, and granulated sugar until light and fluffy. No lumps allowed.
Mix in the egg and vanilla extract until fully combined. No shortcuts.
Gradually add dry ingredients to the wet mixture, stirring until just combined. Overmixing leads to sad cookies.
Fold in white chocolate chips and chopped white chocolate. More is always better.
Scoop tablespoon-sized portions onto the baking sheet, spacing them 2 inches apart. No cookie collisions.
Bake for 12 minutes, or until edges are set but centers look slightly soft. Trust the process.
Cool on the sheet for 5 minutes, then transfer to a rack. Or just eat them now.
Pair with coffee, milk, or straight from the tray. No wrong choices.