Trim, peel and thinly slice <quantity>1</quantity> onion

Add some vegetable oil to a skillet over medium-low heat and add the onion

Add the leaves of <quantity>1<unit>sprig</unit></quantity> of thyme and stir

Lower the heat and cook the onion, stirring constantly, until completely caramelized

Transfer the caramelized onion to another recipient and blend with a hand blender until it becomes a smooth purée. Set aside

Add <quantity>300<unit>g</unit></quantity> of all-purpose flour and <quantity>7<unit>g</unit></quantity> of salt to a bowl

Add <quantity>35<unit>ml</unit></quantity> of water and <quantity>100<unit>g</unit></quantity> of melted butter

Add <quantity>1<unit>tbsp</unit></quantity> of the caramelized onion purée and work on the dough into a tight ball

Cover the dough with a clean kitchen towel and place in the refrigerator overnight to rest

Preheat the oven to <temperature>165<unit>°C</unit></temperature>

Roll out the dough as thin as possible using a rolling pin

Place the flattened dough on a wire rack lined with parchment paper and sprinkle with flaky salt to taste

Bake the dough for 6m until the edges begin to turn golden

Flip the dough around and bake it for 2m until golden brown. The caramelized onion cracker is ready

Grab your favorite dip and enjoy!