# 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
# Step-by-Step Guide:
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.
03 - Beat in egg and vanilla extract until well combined.
04 - In a separate bowl, whisk together flour, ground cinnamon, baking soda, baking powder, and salt.
05 - Gradually add dry mixture to wet ingredients, mixing until just combined.
06 - In another bowl, combine softened butter, brown sugar, flour (start with 1/3 cup and add more as needed), ground cinnamon, and salt. Mix until crumbly texture forms.
07 - Scoop cookie dough onto prepared baking sheets using about 1 1/2 tablespoons per cookie, leaving space between each. Gently press an indent into the center of each cookie.
08 - Fill each indent generously with streusel mixture.
09 - Bake for 10 to 12 minutes, or until edges are lightly golden.
10 - Cool on baking sheet for 5 minutes, then transfer to wire rack to cool completely.
11 - Whisk together powdered sugar, milk, and vanilla until smooth. Drizzle over cooled cookies.
