Preheat oven to 400°F. Line a baking sheet with parchment paper and set aside.
In a large bowl, gently toss flour, sugar, baking powder, baking soda and salt.
In a separate small bowl, whisk sour cream, egg, and almond extract until completely smooth.
Grate frozen butter into flour mixture. Using your hands, work in the butter until the mixture is crumbly. Gently stir in sour cream mixture until just about combined. Carefully stir in the raspberries. Note: If using fresh raspberries, they will smash, just work carefully and try not to over work the dough. Gently press the dough against the sides of the bowl a few times and form a ball. The dough will be sticky if using fresh raspberries.
Place dough on a heavily floured surface and lightly pat into an 8" circle about ¾" thick. Use a very sharp knife to cut into 8 triangles (like a pizza). Transfer triangles onto prepared baking sheet in a circle shape or in two rows (4 in each row) leaving about 1" between each one.
Bake scones for 15-17 minutes or until the tops begin to golden. Don't take them out too early or they will be too soft. Allow them to cool for 10 minutes on the pan before transferring onto a wire rack to finish cooling completely.
For the glaze, melt white chocolate chips and cream in a small bowl in the microwave at 30 second intervals. Be very careful because white chocolate seizes up very fast. Once scones are completely cooled, go ahead and drizzle the glaze on top.