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Big Narstie treats Paul Hollywood to a rasta pie that's too hot to handle and knocks up some shortbread with an important message for dog owners. Then it's the turn of Sandi Toksvig to play Little Narstie as Bake Off fans are treated to something special a presenter doing the baking!

#GBBO #CelebBakeOff #BakeOff #BigNarstie

0:00 Signature Challenge: Shortbread Biscuits
1:17 Technical Challenge: Pork Pies
2:14 Showstopper Challenge: SelfPortrait Cake

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ABOUT BAKE OFF:
The Great British Bake Off is the ultimate baking battle where passionate amateur baking fans compete to be crowned the UK’s Best Amateur Baker.

ABOUT THE GREAT STAND UP TO CANCER BAKE OFF:
The Great British Bake Off welcomes an array of famous faces into the Tent to battle it out for the coveted Star Baker apron in aid of Stand Up To Cancer. In each episode, the celebrities tackle Signature, Technical and Showstopper challenges all under the watchful eyes of judges Paul Hollywood and Prue Leith.