Prepare the Blondie Batter:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease and line an 8×8-inch baking pan with parchment paper, allowing some overhang for easy removal.
2. Mix the Dry Ingredients: In a medium bowl, whisk together the flour, baking powder, and salt. Set aside.
3. Cream the Butter and Sugar: In a large mixing bowl, cream the softened butter and granulated sugar using an electric mixer until light and fluffy, about 3-4 minutes.
4. Add the Eggs and Flavors: Beat in the eggs one at a time, mixing well after each addition. Stir in the lemon zest, lemon juice, and vanilla extract.
5. Combine Wet and Dry Ingredients: Gradually add the dry ingredients to the wet ingredients, mixing just until combined.
6. Fold in the Strawberries and Optional White Chocolate Chips: Gently fold in the diced strawberries and white chocolate chips, being careful not to overmix to avoid mushy strawberries.

Bake the Blondies:

7. Bake: Pour the batter into the prepared baking pan, spreading it out evenly. Bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean or with a few moist crumbs.
8. Cool: Let the blondies cool completely in the pan on a wire rack before glazing and slicing.

Make the Glaze:

9. Prepare the Glaze: In a small bowl, whisk together the powdered sugar, fresh lemon juice, and milk until smooth and pourable. Adjust the consistency by adding more milk if necessary.
10. Glaze the Blondies: Once the blondies have cooled, drizzle the glaze over the top, spreading it evenly with a spatula if desired.