In a large bowl, combine sliced plums, chopped apples, brown sugar, Triple Sec, cornstarch, almond extract and allspice. Spoon mixture into a 10" cast iron skillet or heavy baking dish.
Make Biscuit Topping:
In another large bowl, combine flour, baking powder, salt, sugar, almond extract, and orange zest.
Grate the cold butter into the bowl, and rub in using your fingers or a pastry cutter until the mixture looks like coarse sand.
Gently stir in the whipping cream until mixture is just moistened.
Assemble the Cobbler
Use your hands to gently mound the dough in small islands on top of the fruit mixture in the cast iron skillet. Sprinkle coarse sugar on top.
Bake in the middle rack of the oven for about 45 minutes. If the top is browning quickly, move the cobbler to the bottom rack for the last 5-10 minutes.
Serve warm with ice cream, or at room temperature with whipped cream.
Notes
Please note that the nutritional information for this recipe is only an estimate, and has been calculated using a plugin.