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Preheat the oven to 325°F. Lightly grease (or line with parchment) two baking sheets.
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In a large bowl, beat together the butter, sugar, vanilla, almond extract, and salt.
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Beat in the almond flour, then the all-purpose flour.
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Scoop chestnut-sized (1") pieces of dough, and roll them into balls. A level teaspoon cookie scoop will give you just the right amount of dough. Place the balls on the prepared baking sheets, leaving 1" between them.
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Bake the cookies for 15 to 20 minutes, until they feel set on top: some of them may start to barely brown around the edges.
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While the wedding cookies are baking, put the topping sugar in a shallow bowl.
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Remove the wedding cookies from the oven, allow them to cool on the pan for a few minutes, and then transfer them, 5 or 6 at a time, to the bowl. Roll them in the sugar to coat, then transfer them to a rack to cool.
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When the wedding cookies are cool, roll them in the sugar again; they should be thoroughly coated and snowy white.
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Store leftover wedding cookies airtight at room temperature for several days; freeze for longer storage.