Put 22 regular Oreo cookies in a food processor and pulse until they are a very fine crumb. Alternatively, place them in a ziplock bag and mash them with a rolling pin.
Add ½ cup unsalted butter, melted to the food processor and process until fully combined. Pour the crust mixture into a 9-inch tart pan.
Use the back of a spoon to press the Oreo crumbs into the tart pan until fully compacted. Set aside for now.
Add 1 cup semi-sweet chocolate, finely chopped, 1 cup milk chocolate, finely chopped, and 2 tablespoons unsalted butter, cubed to a heat-proof bowl.
Pour 1 cup heavy cream into a saucepan set over a low heat. Remove the pan from the heat just before it comes to a boil (do not allow it to come to a boil, as this will cause the chocolate to seize). Pour the cream over the chopped chocolate and butter, then put a plate over the top and leave it for 5 minutes.
After 5 minutes, use a rubber spatula to slowly mix together the chocolate, butter and cream.
When all the ingredients are fully combined stop mixing. If the chocolate hasn’t completely melted see the recipe notes below.
Pour the chocolate filling on top of the Oreo crust, use an offset spatula to spread out the filling so that it is very smooth and even. Allow the tart to set for at least 4 hours before serving.
When the chocolate filling has set, decorate the tart with the fresh fruit and edible violas.
Notes
You do not need to remove the filling from the Oreos before pulsing.
We find it easier to work the Oreo crumbs around the edges of the tart pan first and then smooth out the center.
It’s important to chop the chocolate very finely so that it all melts at the same rate. Take care not to allow the heavy cream to come to the boil. If the cream is too hot, the chocolate will seize.
If the chocolate doesn’t completely melt, make a Bain-Marie by adding an inch of boiling water to a small saucepan and place the bowl of chocolate on top of the pan (don’t let the bottom of the bowl touch the water). Stir the chocolate very slowly until it has all melted.
Stop stirring the moment the chocolate filling ingredients have melted together. The reason for this is that if you over-stir at this point, the chocolate can lose its beautiful shine.
It’s unlikely to happen, but if the chocolate seizes, you can attempt to rescue it by doing the following:
Use the Bain-Marie method as described above, and vigorously whisk the chocolate filling until it comes together.
If this doesn’t work, you can add room temperature milk a teaspoon at a time until the mixture comes back together.
For the best results, allow the Chocolate Tart to set at room temperature, as this will give you the smoothest filling. However, if the weather is very warm, you can put the tart into the fridge to set.
Storage: This No-Bake Chocolate Tart will keep well in the fridge for up to 3 days. The fruit topping will inevitably weep a little after about 24 hours. Allow it to come to room temperature before slicing and serving.