Black Raspberry Ice Cream Sandwiches

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2 cups all-purpose flour

1/2 teaspoon baking soda

1/2 teaspoon salt

1 stick unsalted butter, at room temperature

1/2 cup granulated sugar

1/2 cup packed light brown sugar

1 large egg

1 tablespoon grated lemon zest, plus 1 tablespoon lemon juice

1 teaspoon pure vanilla extract

1/3 cup sour cream

Sanding sugar, for sprinkling

2 pints black raspberry chip ice cream