In a medium-sized mixing bowl, whisk together the Nutella, eggs, sugar, milk, and vanilla extract until well combined.
Whisk in the all-purpose flour until the mixture is smooth and creamy. Do not overmix.
0.5 cup Nutella (Hazelnut Spread)
Grease a mini brownie pan or a mini cupcake pan well with baking spray.
Pour the Nutella mixture into each cavity, filling them about 2/3 full.
Bake for 14 to 15 minutes, or until a toothpick inserted into the center comes out clean.
Carefully invert the pan onto a wire cooling rack and let the bites cool completely.
Dust generously with powdered sugar before serving.
0.5 cup Nutella (Hazelnut Spread)
Notes
These bites are rich and fudgy. Ensure not to overbake them to maintain the brownie-like texture. They are best enjoyed the day they are made, but can be stored in an airtight container.