Step 1: Get Ready to Bake! Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper, making cleanup a breeze!
Step 2: Mix the Magic Dough! In a large bowl, use an electric mixer on medium-high speed to cream together the softened butter and powdered sugar until the mixture is wonderfully light and fluffy. Stir in the vanilla extract until it's perfectly smooth. Next, turn the mixer to low and gradually add the all-purpose flour, mixing just until a soft dough forms. Be careful not to overmix! Finally, gently fold in the mini chocolate chips and toffee bits with a spatula until they are evenly distributed throughout the dough.
Step 3: Shape Your Treats! Using your hands, scoop about a spoonful of dough and roll it into a neat 1-inch ball. Place each dough ball onto your prepared baking sheet, making sure to leave about one inch of space between them. Lightly press down on each ball to slightly flatten the tops, which helps the cookies bake evenly. If your kitchen is warm, you can pop the tray in the fridge for 5-10 minutes before baking to help the cookies keep their perfect shape.
Step 4: Bake to Golden Perfection! Bake the cookies at 350°F for 12-14 minutes, or until their edges are just turning golden and they feel firm to the touch. Let them cool on the baking sheet for 5 minutes – they're delicate when hot! Then, carefully transfer them to a wire rack to cool completely. Repeat this process with any remaining dough, ensuring your baking sheets are cool before starting a new batch.
Step 5: Store and Enjoy! Once your delicious shortbread cookies are thoroughly cooled, store them in an airtight container at room temperature for up to 3 days to keep them fresh and tender. They're perfect for a quick, homemade snack or a delightful gift!