Crimp
Pastry dough is crimped to create a seal and a decorative element by pinching it together with fingers or a utensil.
Useful Links:
What does it mean to crimp? | Cookthink
Fun related videos
How to crimp a pie crust

How to crimp a pie

Crimping Edges

Pastry crimper TESCOMA DELÍCIA

How to Crimp and Lattice Pie Dough | Perfect American Pie
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How to crimp a pie crust
Source: Great British Chefs
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How to crimp a pie
Source: Chicago Tribune
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Crimping Edges
Source: Epicurious
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Pastry crimper TESCOMA DELÍCIA
Source: tescomavideo EN
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How to Crimp and Lattice Pie Dough | Perfect American Pie
Source: Kitchen Stories (US)