1-First Step: Prepare the oven and baking sheet. Preheat your oven to 350°F. Line a baking sheet with parchment paper so the cookies release easily and bake evenly. This small step matters because it keeps the bottoms from overbrowning and makes cleanup much easier.

2-Second Step: Mix the dry ingredients. In a medium bowl, whisk together the flour, baking soda, salt, espresso powder, and Vietnamese cinnamon. Whisking now helps distribute the spice and leavening evenly through the dough, so every cookie bakes with the same texture and flavor. If you are using a gluten-free blend, whisk it the same way before moving on.

3-Third Step: Cream the butter and sugars. In a separate large bowl, beat the unsalted butter with the light brown sugar, dark brown sugar, and granulated sugar until the mixture looks smooth and a little fluffy. This usually takes about 2 to 3 minutes with a hand mixer, though you can also do it by hand with a sturdy spoon and a little patience. The mix of sugars gives these chocolate chip cookies a chewy middle and lightly crisp edge, and the dark brown sugar is what adds that deeper color.

4-Fourth Step: Add the egg and vanilla. Beat in the egg at room temperature and the vanilla extract until the dough looks glossy and well blended. Room-temperature egg mixes more smoothly into the butter, which helps the batter stay creamy instead of lumpy. If you forgot to take the egg out ahead of time, set it in warm water for 5 minutes.

5-Fifth Step: Bring the dough together. Add the dry ingredients to the wet mixture and stir just until no dry streaks remain. Overmixing can make the cookies tough, so stop as soon as the flour disappears. Fold in the dark chocolate chips with a spatula so they stay evenly spread throughout the dough.

6-Sixth Step: Chill the dough for the best texture. Cover the bowl and refrigerate the dough for at least 24 hours if you can. This resting time helps the flour hydrate, gives the Vietnamese cinnamon time to bloom, and keeps the cookies from spreading too much in the oven. If you are short on time, chill for at least 2 to 4 hours, but the flavor will be more developed with a longer rest.

7-Seventh Step: Scoop and shape. When you are ready to bake, let the dough sit at room temperature for about 10 minutes so it is easier to scoop. Use a 2-tablespoon cookie scoop for even portions, then place the dough balls about 2 inches apart on the prepared baking sheet. Keeping the size consistent helps every cookie bake at the same pace, which is especially useful if you are making a batch for gifting or meal prep.

8-Eighth Step: Bake until set around the edges. Bake for 9 to 11 minutes, or until the edges look set and lightly golden while the centers still look a little soft. The cookies will continue to cook from the hot pan after you remove them from the oven, so do not wait until they look completely firm. That is how you keep the centers chewy instead of dry.

9-Ninth Step: Cool before moving. Let the cookies cool on the baking sheet for 10 to 15 minutes before transferring them to a wire rack. This cooling time helps the structure set so they do not fall apart. Once they firm up, the chocolate chips stay melty and the Vietnamese cinnamon aroma becomes even more noticeable.

10-Tenth Step: Serve and enjoy. Serve the cookies warm, room temperature, or tucked into an airtight container for later. They taste great with coffee, tea, or a cold glass of milk. If you want to dress them up for guests, add a small pinch of cinnamon on top right before baking for a pretty finish.