01 - Whisk flour, sugar, baking powder, baking soda, and salt in a large bowl.
02 - In another bowl, whisk milk, egg, melted butter, and vanilla extract until smooth.
03 - Pour wet ingredients into dry and stir gently until just combined without overmixing.
04 - Heat a nonstick skillet or griddle over medium heat and lightly grease with butter.
05 - Pour ¼ cup batter per pancake onto the skillet. Cook until bubbles appear and edges set, about 2 minutes, then flip and cook an additional 1 to 2 minutes until golden. Repeat with remaining batter.
06 - Spread a tablespoon of chocolate hazelnut spread over each pancake as you stack them.
07 - Top with chopped hazelnuts, a dusting of powdered sugar, and fresh berries if desired. Serve warm.