Print
clock clock iconcutlery cutlery iconflag flag iconfolder folder iconinstagram instagram iconpinterest pinterest iconfacebook facebook iconprint print iconsquares squares iconheart heart iconheart solid heart solid icon

Grandma’s Onion Squares

5 Stars 4 Stars 3 Stars 2 Stars 1 Star No reviews
  • Prep Time: 15 minutes
  • Cook Time: 35 minutes
  • Total Time: 50 minutes
  • Yield: 9 squares 1x
  • Category: Appetizer, Side Dish
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Description

These savory, buttery Onion Squares are a nostalgic, simple treat made with caramelized onions and a biscuit-like base. Perfect as an appetizer or side dish, they bring out the warm flavors of home-cooked goodness. A perfect recipe for family gatherings or a quick snack


Ingredients

Scale
  1. For the Dough:
    • 2 cups all-purpose flour
    • 1 tbsp baking powder
    • ½ tsp salt
    • ½ cup unsalted butter, melted
    • ¾ cup whole milk
    • 1 large egg
  2. For the Onion Topping:
    1. 2 tbsp butter
    2. 2 large onions, finely chopped
    3. ½ tsp salt
    4. ¼ tsp black pepper
    5. ½ tsp garlic powder (optional)
    6. ½ tsp dried thyme or rosemary (optional)
    7. ½ cup shredded cheese (cheddar or Swiss, optional)

Instructions

  • Preheat & Prepare the Pan: Preheat oven to 375°F (190°C). Grease a 9×9-inch baking dish or line with parchment paper.

  • Cook the Onions: Melt butter in a skillet over medium heat. Add chopped onions, salt, pepper, and optional garlic powder/herbs. Cook for 8-10 minutes, stirring occasionally, until onions are soft and lightly golden. Remove from heat and set aside.

  • Make the Dough: In a bowl, whisk together flour, baking powder, and salt. In a separate bowl, mix melted butter, milk, and egg. Gradually add the wet ingredients to the dry ingredients, stirring until just combined (do not overmix).

  • Assemble & Bake: Spread the dough evenly into the prepared baking dish. Top with the cooked onions and sprinkle with cheese if using. Bake for 25-30 minutes, or until golden brown and set in the center.

  • Cool & Serve: Let cool for 5 minutes, then slice into squares and serve warm


Notes

  • For a variation, try using different herbs like oregano or basil.
  • These onion squares are best served fresh but can be stored in an airtight container for up to 2 days.

Nutrition

  • Serving Size: 1 square
  • Calories: 220 kcal
  • Sugar: 4g
  • Sodium: 400mg
  • Fat: 14g
  • Saturated Fat: 9g
  • Unsaturated Fat: 3g
  • Trans Fat: 0g
  • Carbohydrates: 23g
  • Fiber: 1g
  • Protein: 3g
  • Cholesterol: 45mg