1-First Step: Begin by preheating your oven to 350°F (177°C). While the oven heats, line your baking sheets with parchment paper or silicone baking mats. This prevents sticking and makes cleanup a breeze. Proper preparation ensures your flourless chocolate chip cookies bake evenly and release easily from the pan.

2-Second Step: Crack one large egg into a medium bowl. Using a whisk or fork, beat the egg until it is well combined and slightly frothy. This incorporates air into the mixture, which helps create a lighter texture in your finished cookies. Ensure there are no streaks of egg white remaining.

3-Third Step: Add 1 cup of almond butter or peanut butter to the beaten egg. If your nut butter has been refrigerated, you can use it cold, but room temperature nut butter will incorporate more easily. Next, add 1/2 cup of lightly packed brown sugar (light or dark brown sugar both work beautifully) and 1 teaspoon of baking soda. If you are using vanilla extract, add 1/2 teaspoon now.

4-Fourth Step: Mix the ingredients very well until combined. A sturdy spatula works perfectly for this task. The mixture will transform from somewhat separated to a thick, cohesive dough. Continue mixing until there are no visible streaks of egg or dry pockets of sugar. This thorough mixing is crucial for the texture of your flourless chocolate chip cookies, as it ensures the baking soda is evenly distributed throughout the dough.

5-Fifth Step: Gently fold in 1 cup of semi-sweet or dark chocolate chips. If you prefer alternatives, you can use peanuts, peanut butter chips, or even a combination of your favorite mix-ins. Just remember that the total add-ins should not exceed 1 cup to maintain the proper structure of the cookie dough.

6-Sixth Step: Using a cookie scoop or tablespoon, portion about 1.5 tablespoons of dough per cookie onto your prepared baking sheets. Space them about 2 inches apart to allow for slight spreading. Gently press down each dough mound with the back of a spoon or your fingers to flatten slightly. If you notice excess oil on the dough balls, blot gently with a paper towel. This happens sometimes with natural nut butters and helps prevent overly greasy cookies.

7-Seventh Step: Place the baking sheets in the preheated oven and bake for 10 minutes. The flourless chocolate chip cookies will appear soft and slightly underbaked when you remove them from the oven, but this is exactly what you want. They will continue to set as they cool on the baking sheet. If you prefer a crispier cookie, you can extend the baking time by 1-2 minutes, but watch closely to avoid overbaking.

8-Eighth Step: Allow the cookies to cool on the baking sheet for 10 minutes. This resting period is crucial as it lets them firm up without becoming dry. During this time, they will transform from soft and puffy to perfectly chewy with slightly crispy edges. After 10 minutes, transfer them to a wire rack to cool completely.

9-Final Step: Once completely cooled, these flourless chocolate chip cookies are ready to enjoy! Store any leftovers in an airtight container at room temperature for up to 7 days. For longer storage, you can freeze the cookies for up to 3 months and thaw them overnight in the refrigerator or at room temperature for 1-2 hours before serving.