Directions

• In a medium bowl, mix all-purpose flour, brown sugar, cinnamon, and salt. Blend in softened butter until it resembles coarse crumbs. Refrigerate for about 30 minutes to firm up.
• Preheat your oven to 400°F (200°C). Line your baking sheets with parchment paper to prevent sticking.
• In a large bowl, whisk together all-purpose flour, cake flour, cornstarch, cinnamon, baking soda, baking powder, and salt.
• In a stand mixer, beat cold butter with brown and granulated sugars until creamy and fluffy, about 2-3 minutes.
• Mix in the egg, egg yolk, and vanilla extract until fully combined.
• Gradually add the flour mixture to the wet ingredients, mixing until just combined.
• Scoop and roll the dough into 1-inch balls, placing them on the prepared sheets. Create an indent in the center of each ball and fill with the prepared streusel mixture.
• Bake in the preheated oven for 8-11 minutes, or until the edges are just golden brown. Allow to cool slightly on the sheet before transferring to a wire rack.
• In a small bowl, whisk together the heavy cream and powdered sugar until smooth. Drizzle over the cooled cookies.
• Optional: Sprinkle with extra cinnamon before serving.