Bubbles on samosa crusts usually occur due to trapped air or moisture in the dough, or from frying at too low a temperature. Ensuring proper dough preparation and maintaining the correct oil temperature are key to achieving a smooth, crisp crust.
Several factors can contribute to bubbles forming on your samosas:
Dough Consistency: If the dough is too wet or hasn't been kneaded sufficiently, it can trap moisture and air. This trapped air expands during frying, creating bubbles. Ensure your dough is firm, well-kneaded, and rested properly.
Oil Temperature: Frying at too low a temperature causes the samosas to absorb more oil and cook unevenly. The moisture in the dough then steams, leading to bubble formation. Maintain a consistent oil temperature between 160°C to 180°C (320°F to 356°F).
Air Pockets: When folding and sealing the samosas, ensure you eliminate any air pockets. Trapped air will expand during frying and cause bubbles.
Dough Thickness: If the dough is rolled too thickly, the outer layer may cook faster than the inner layer, trapping steam and causing bubbles. Roll the dough to a consistent, relatively thin thickness.
Before frying, prick the samosas a few times with a fork. This allows steam to escape and prevents bubble formation without compromising the crispness.