# What You'll Need:
→ Cookie Dough
01 - 1/2 cup unsalted butter, softened
02 - 1/2 cup vegetable oil
03 - 1 cup packed brown sugar
04 - 1 large egg
05 - 1 teaspoon vanilla extract
06 - 2 teaspoons ground cinnamon
07 - 1/2 teaspoon baking soda
08 - 1/2 teaspoon baking powder
09 - 1/2 teaspoon salt
10 - 2 1/2 cups all-purpose flour
→ Streusel Topping
11 - 1/4 cup unsalted butter, softened
12 - 1/4 cup packed brown sugar
13 - 1/3 to 1/2 cup all-purpose flour
14 - 1/2 teaspoon ground cinnamon
15 - Pinch of salt
→ Icing
16 - 1/2 cup powdered sugar
17 - 1 tablespoon milk
18 - Splash of vanilla extract
# Steps to Follow:
01 - Preheat oven to 350°F. Line baking sheets with parchment paper.
02 - In a large mixing bowl, cream together softened butter, vegetable oil, and brown sugar until light and fluffy, approximately 2-3 minutes.
03 - Beat in the egg and vanilla extract until fully incorporated.
04 - In a separate bowl, whisk together flour, ground cinnamon, baking soda, baking powder, and salt. Gradually add the dry mixture to the wet ingredients, mixing until just combined.
05 - In another bowl, combine softened butter, brown sugar, flour starting with 1/3 cup and adjusting as needed for crumbly texture, ground cinnamon, and salt. Mix until crumbly throughout.
06 - Scoop cookie dough onto prepared baking sheets using approximately 1 1/2 tablespoons per cookie, spacing them apart. Gently press an indent into the center of each cookie and fill generously with streusel mixture.
07 - Bake for 10-12 minutes until edges are lightly golden brown.
08 - Cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
09 - Whisk together powdered sugar, milk, and vanilla extract until smooth. Drizzle over completely cooled cookies.