Crispy Whole Wheat Graham Crackers

Name: Crispy Whole Wheat Graham Crackers
Ingredients: 3/4 cup (5 1/2 ounces) sugar; 1 1/2 teaspoons baking soda; 1/2 teaspoon Diamond Crystal kosher salt (half as much if iodized); 1/4 teaspoon ground cinnamon; 1 tablespoon vanilla extract; 1/4 cup (3 ounces) golden syrup, such as Lyle’s, sorghum, unsulfured molasses (not blackstrap), or honey; 1 1/2 sticks (6 ounces) unsalted butter, solid but creamy—about 70°F; 2 1/2 cups (12 ounces) whole wheat flour (not stone-ground or white whole wheat), plus more for dusting