Mustard Onion Sandwich Buns

Elevate your homemade sandwiches and burgers with these irresistible Mustard Onion Sandwich Buns! Infused with the bold tang of yellow mustard and the sweet savoriness of caramelized onions, these soft and fluffy buns are a flavor-packed upgrade from store-bought options. Perfectly golden and deliciously fragrant, they are topped with optional sesame seeds for added texture and visual appeal. This recipe combines simple pantry staples like all-purpose flour, butter, and milk, with easy techniques such as kneading and proofing, to yield bakery-quality buns in the comfort of your kitchen. Whether you're building a gourmet burger or crafting a deli-style sandwich, these buns will add depth and a homemade touch to every bite. Make your sandwiches unforgettable with these uniquely flavored, artisanal buns!

Nutriscore Rating: 66/100

Prep Time:20 mins

Cook Time:20 mins

Total Time:40 mins

Servings: 8

Ingredients

• 4 cups All-purpose flour
• 2 tablespoons Granulated sugar
• 1.5 teaspoons Salt
• 2.25 teaspoons Instant yeast
• 1 cup Warm water (110°F/43°C)
• 0.5 cup Whole milk
• 3 tablespoons Unsalted butter, melted
• 2 tablespoons Prepared yellow mustard
• 1 medium Onion, finely chopped
• 1 tablespoon Olive oil
• 1 large Egg, beaten
• 2 tablespoons Sesame seeds (optional)

Directions

Step 1

In a medium skillet, heat the olive oil over medium heat. Add the finely chopped onion and cook, stirring occasionally, until softened and caramelized (about 8–10 minutes). Remove from heat and let cool.

Step 2

In a large mixing bowl, whisk together the all-purpose flour, sugar, salt, and instant yeast.

Step 3

In a separate bowl, combine the warm water, whole milk, melted butter, and mustard. Stir thoroughly.

Step 4

Add the wet ingredients to the dry ingredients and mix until a sticky dough forms. Fold in the cooled caramelized onions.

Step 5

Transfer the dough onto a floured work surface and knead for 8–10 minutes until smooth and elastic. Alternatively, knead with a stand mixer using the dough hook attachment for 6–8 minutes.

Step 6

Shape the dough into a ball and place it in a greased bowl. Cover with a clean kitchen towel or plastic wrap and let it rise in a warm place for 1 hour, or until the dough doubles in size.

Step 7

Punch down the dough and divide it into 8 equal portions. Shape each portion into a round bun and place them on a parchment-lined baking sheet, spacing them evenly.

Step 8

Cover the shaped buns with a kitchen towel and let them rise for 30 minutes, until slightly puffy.

Step 9

Preheat the oven to 375°F (190°C). Brush the top of each bun with the beaten egg and sprinkle with sesame seeds if desired.

Step 10

Bake the buns in the preheated oven for 18–20 minutes, or until golden brown and the tops sound hollow when tapped.

Step 11

Remove the buns from the oven and let them cool on a wire rack before slicing them for sandwiches or burgers.

Nutrition Facts

Serving size	(1122.6g)

Amount per serving	% Daily Value*
Calories	2509.8

Total Fat 72.7g	0%
Saturated Fat 29.8g	0%
Polyunsaturated Fat 1.5g
Cholesterol 292.6mg	0%
Sodium 4005.7mg	0%
Total Carbohydrate 392.3g	0%
Dietary Fiber 20.2g	0%
Total Sugars 12.3g
Protein 68.5g	0%

Vitamin D 93.7IU	0%
Calcium 468.3mg	0%
Iron 27.2mg	0%
Potassium 1123.5mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 26.2%

Protein: 11.0%

Carbs: 62.8%