In mixer, beat the butter and sugar together until the mixture is pale and fluffy.
Add the almond flour and salt, mixing until combined. Blend in one whole egg, then the white from the second egg, keeping the yolk aside.
Stir in the extracts.
Cover the mixture and chill it in the refrigerator for at least 1 hour.
Mix the yolk with 1 teaspoon cold water; and store it covered in the refrigerator until needed.
Pastry
Roll out the 2 pastries. Cut the edges to create a circle 9 1/2 inches in diameter.
Place one round of dough on a parchment‑lined baking sheet. Spread the filling evenly over the surface, leaving a 1‑inch border uncovered.
Lightly moisten the border with cold water, lay the second dough circle on top, and press the edges together with your fingertips to seal thoroughly.
Use the teeth of a fork or a spoon to press the edges together about 1/4 to 1/2 inch deep half inch apart.
Place it in the refrigerator for at least 30 minutes.
Pre-heat the oven to 425°F.
Brush a thin coat of the reserved egg wash over the top of the galette, keeping it off the border—any egg wash on the rim will prevent it from rising
Using the tip of a paring knife, score a decorative pattern on the surface without cutting through the dough. Make six small slits in the top to allow steam to escape.
Decrease the oven temperature to 400°Fand bake the galette for 30 to 40 minutes, until the pastry has puffed up and turns a golden brown. Check it after 20 minutes of baking to ensure it is not turning too brown. If so, cover it lightly with foil.
When it is baked completely, remove the galette from the oven and cool on a baking rack for 15 minutes. The pastry may deflate.