American-Style Creamy Greek Dressing

½ cucumber

chopped

½ (4 ounce) package brine-packed feta cheese

¼ cup mayonnaise

¼ cup sour cream

3 tablespoons milk

2 tablespoons olive oil

1 ½ teaspoons garlic powder

or to taste

1 teaspoon salt

or to taste

½ teaspoon onion powder

or to taste

½ teaspoon ground black pepper

or to taste