Combine all the dry ingredients in a large bowl and stir to combine.
Add the butter and mix with a pastry cutter or bare hands until all the butter is worked in.
Combine the puree, milk, egg, and vanilla in a small bowl and whisk.
Add to the flour butter combination and stir until makes a wet dough.
Heavily flour a wood board and pat the dough down, turning several times to make sure it doesn't stick.
Cut the dough into wedges. Bake for 10 minutes on a parchment lined baking sheet.
Prepare the icing by placing all the ingredients in a bowl and whisk to combine. Place a spoonful or two over each baked, slightly cooled scone. Dust with chopped pecans.