Step 1: Prepare Syrup
In a saucepan, mix sugar and water.
Heat gently until sugar dissolves.
Add saffron, rose water, and vinegar.
Simmer until slightly thickened, then set aside to cool.
Step 2: Make Batter
Mix yogurt and cornstarch with a hand mixer for 3 minutes.
Sift flour and gradually add to the mixture.
Stir in rose water, cardamom, baking soda, and melted butter.
Let the batter rest for 5-10 minutes.
Step 3: Frying
Heat oil in a deep pan (medium heat).
Pour batter into a piping bag or squeeze bottle.
Pipe circular shapes into hot oil.
Fry until golden and crispy.
Step 4: Soaking in Syrup
Remove fried zoolbia and drain excess oil.
Soak in syrup for 2-3 minutes.
Place on a serving dish.
Step 5: Serving
Chill in the refrigerator for 2 hours.
Garnish with pistachios or rose petals if desired.
Serve with Persian tea.