Pulse the icing sugar, flour, and butter in a food processor until the texture of the mixture is similar to fine breadcrumbs.
Mix egg and vanilla in a small bowl and add then again combine the egg mixture to flour. Place it on a work surface bring them together with the help of your hands. And wrap in a clingfilm after making it into a disc shape and allow to chill for 1 hr.
Lightly spread the flour throughout the workspace and roll the pastry. Use a nearly 23cm deep, round , loose-bottomed tart to trim the edges to make the pastry shape neaten. Then Chill for another 30 min until it gets firm.
Set your oven to 180°C/ mark 4 conditions. Line pastry case with a piece of baking parchment and fill it with baking beans. Put on a baking tray and bake for 20-25min until the pastry sides are set.
After that carefully remove the baking beans and parchment. Place in oven for another 5min, until your pastry gets a golden color and the base texture is sandy when touching. Keep aside to cool slightly within the tin until you make the fillings.
M ix all the ingredients required for pumpkin layer, until they are well combines. Scrape it into the pastry layer and spread evenly in a uniform layer.
For making frangipane, beat the sugar and butter using an electric beater until it becomes creamy and light (usually 5 min). Add the eggs and and beat gradually. Then mix ground almonds and flour using a spoon.After that add it on above the pumpkin layer an spread evenly to make a uniform layer
Until the frangipane turns golden and firm bake for around 30 minutes. Leave for cooling for 10min in the tin and transfer to a wire rack for cooling completely.
Put the icing sugar into a bowl and beat with 3 - 3.5 tbsp of water to form a thick, smooth icing.
Separate 1 tbsp of icing into a another bowl and add black food coloring. Then take a piping bag and transfer the black colored icing into it. Use the remaining icing to dye with orange food coloring.
Once the tart cools completely, pour the orange colored icing and spread evenly with a palette knife.Using black color icing ,Draw 6 concentric circles on the orange icing. With a proper stick before the black icing sets drag lines from inside to outside resembling a spider web.
Keep for 25-30 minutes to set before serving.