Speculoos Cookie Sandwiches

INGREDIENTS

• For Cookies:
• 1/2 cup butter, cold, cut into 1/2-inch cubes
• 1/3 cup granulated sugar
• 3/4 cup light brown sugar
• 1 teaspoon molasses
• 1/2 teaspoon fine sea salt
• 1/4 teaspoon baking soda
• 2 1/2 teaspoons ground cinnamon
• 1/4 teaspoon ground nutmeg
• 1/2 teaspoon ground ginger
• 1/4 teaspoon ground cloves
• 1/4 teaspoon finely ground black pepper
• 1 teaspoon vanilla extract
• 1 large egg
• 1 3/4 cup all-purpose flour
• For Filling:
• 1/2 cup (1 stick) unsalted butter, room temperature
• 1/3 cup cocoa powder, sifted (natural or dutch is fine, I used a mixture)
• 1 1/2 cups powdered sugar
• 1/4 cup heavy cream, more or less as needed
• 1/2 teaspoon vanilla extract
• 1/4 teaspoon ground cinnamon
• pinch fine sea salt