Place butter and sugar in the bowl of a large stand mixer, fitted with a paddle attachment OR in a large mixing bowl with a wooden spoon. Mix on medium speed or by hand until creamy, about 2 minutes. Add egg, milk, and vanilla, beating well until smooth.
In a separate medium bowl, combine flour, baking soda, and salt. Fold into butter mixture until dough is just combined, then fold in strawberries and white chocolate.
Scrape dough into a ball and wrap in plastic wrap. Refrigerate dough at least 1 hour or up to 3 days.
When ready to bake cookies, preheat oven to 350F. Line two baking sheets with parchment paper and set aside.
Remove dough from fridge and use a medium cookie scoop to scoop dough out into 1-in balls. Place balls 2 inches apart on prepared baking sheets.
Streusel Topping
In a small bowl, combine all streusel ingredients until crumbly. Set aside for a moment.
Bake cookies at 350F 5 minutes until cookies are slightly melted. Remove from oven and sprinkle streusel topping on each cookie, pressing lightly to adhere crumbs. Continue baking cookies an additional 5-8 minutes until edges are lightly browned.
Remove cookies from oven and allow to cool on baking sheet 10 minutes before transferring to a wire cooling rack to cool completely. Enjoy!
Notes
Storing InstructionsStore cookies in an airtight container at room temperature up to 6 days. Cookies may also be frozen up to 2 months.