Nutella Stuffed Cookies

Bahan-bahan (10 porsi)

• 10 tbsp (slightly heaped) Nutella (or other chocolate-nut spread)
• 1/2 cup dark chocolate chips ((or chopped 70% dark chocolate))
• 1 1/3 cups plain flour / all-purpose flour
• 1/2 tsp baking soda ((bi-carbonate soda, Note 1))
• 1/4 tsp cooking salt / kosher salt
• 120 g / 8 tbsp unsalted butter (, cut into 1 cm / 1/2" cubes (fridge cold is fine))
• 2/3 cup (tightly packed) brown sugar ((Note 2))
• 1 tsp vanilla extract
• 1 tsp honey (or corn syrup (Note 3))
• 1 large egg ((55g / 2 oz), at room temperature (Note 4))