Instructions
Step 1: Prepare the Pan
Preheat the oven to 350°F (175°C).
Grease an 8½ × 4½-inch loaf pan with nonstick cooking spray and line it with parchment paper, leaving an overhang on both long sides for easy removal.
Step 2: Create the Chocolate Base
Place the espresso powder and ¾ cup of the chocolate chips into a large heatproof bowl.
Pour the boiling water over the chocolate and let it sit for 5 minutes.
Whisk until completely smooth and glossy.
Step 3: Mix the Wet Ingredients
Whisk in the brown sugar until dissolved.
Add the melted butter, oil, and vanilla extract.
Whisk until fully combined.
Add the eggs one at a time, whisking well after each addition.
Step 4: Combine the Dry Ingredients
Sift together the flour, cocoa powder, baking soda, and salt.
Fold the dry ingredients gently into the chocolate mixture until no dry streaks remain.
Fold in the remaining chocolate chips.
Step 5: Bake
Transfer the batter to the prepared loaf pan and smooth the top.
Bake for 65 to 75 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs attached.
The internal temperature should reach approximately 200–205°F (93–96°C).
The final step is just as important as the baking itself. Proper cooling allows the crumb to set, making every slice perfectly moist and beautifully clean.
