Prepare the Espresso: Brew a strong espresso and let it cool down. This step is crucial to ensure the espresso blends well with the other ingredients without affecting their temperature.

Mix the Cocktail: In a mixing glass, combine the bourbon, cooled espresso, maple syrup, and chocolate bitters. The maple syrup brings a natural sweetness that complements the robust flavors of bourbon and espresso, while the chocolate bitters add a unique depth and complexity.

Stir with Ice: Add ice cubes to your mixing glass. Stir the mixture for about 30 seconds with a long spoon. This process chills the drink and slightly dilutes it, making the flavors more cohesive.

Strain: Strain the cocktail into a rocks glass filled with a large ice cube (or regular ice cubes if you prefer). A larger ice cube melts slower, keeping your drink cooler and less diluted for a longer time.

Garnish: Enhance your cocktail with a few coffee beans or an orange peel twist on top. The coffee beans intensify the coffee aroma and flavor, while the orange peel adds a subtle citrus note and makes the drink more visually appealing.

Serve and Enjoy: Your Chocolate Espresso Old Fashioned is ready to be enjoyed. This drink perfectly marries the warmth of bourbon with the rich tones of espresso and chocolate, balanced by the sweetness of the maple syrup.