Preheat the oven to 350° F (180°C). Spray a silicone mini muffin pan with non-stick spray and set aside.
Add the butter and chopped chocolate to a microwave safe bowl. Microwave for 30 seconds at a time, stirring in between until completely melted.
6 Tbsp butter , 4 oz bittersweet chocolate, chopped
Whisk in the granulated sugar and corn syrup. Let stand for 5 minutes.
2/3 cup (152g) granulated sugar, 1 Tbsp corn syrup
Add the egg and vanilla extract. Use an electric hand mixer and beat for 2 minutes.
1 egg, 1/2 Tbsp vanilla extract
Fold in the flour and salt until just combined.
3/4 cup (114g) all-purpose flour, 1/2 tsp salt
Portion out the batter into the prepared silicone mini muffin pan.
Bake at 350°F (180°C) for 20-22 minutes or until the tops are glossy and are beginning to crack.
Allow the brownie bites to cool completely before removing from the pan.
Store in an airtight container for up to 4 days. Enjoy!