Preheat oven to 400 degrees F.
In a medium bowl, whisk together the flour, sugar, baking powder, baking soda and salt.
Add butter and mix with your fingertips to a coarse meal. Add buttermilk and mix just until combined. Knead in chopped hazelnuts. Transfer dough to a floured board and divide into 2 parts.
Knead dough 4-5 times. Pat each to 6-inch diameter rounds.
Cut each round into 6 wedges and place slightly separated on a greased or parchment lined baking sheet. Brush the tops with the remaining buttermilk and bake for 20 minutes, or until lightly browned. Serve warm.
In a small saucepan over medium heat, cook diced pears, wine, water and brown sugar for 15-20 minutes, stirring constantly, or until pears are tender. Cool completely.
In a food processor bowl, pulse the pear mixture until smooth. Add butter in stages, and continue to process until completely combined, about 1 minute. Stir in maple syrup.