2 ½ cup salted mini pretzels (about 3 1/2 ounces) 3 tablespoon nonfat milk powder ½ cup plus 5 tablespoons granulated sugar ¼ cup packed light brown sugar ½ teaspoon kosher salt 10 tablespoon unsalted butter, melted 1 ½ pound fresh strawberries, hulled and quartered (about 4 1/2 cups) 1 tablespoon plus 2 teaspoons fresh lemon juice 1 8-ounce package cream cheese, softened ⅔ cup sweetened condensed milk 1 ½ cup heavy cream