This coffee ice cream cake is a no-bake frozen dessert with a buttery cookie crust, creamy coffee filling, and dulce de leche for a rich caramel finish.
Crush 8 oz (230 g) cookies in a food processor until fine. Add ½ cup (130 g) melted unsalted butter and mix until the crumbs resemble wet sand.
Press the crumb mixture firmly into the bottom and slightly up the sides of a cake pan to form the crust. Place the pan in the refrigerator for 30 minutes so the crust firms up.
In a large bowl, beat 2½ cups (600 ml) heavy cream with 4 tablespoons granulated sugar and 5 tablespoons instant coffee powder until stiff peaks form. Gently fold in 1 can (14 oz / 400 g) dulce de leche until the mixture is smooth and evenly combined.
Spoon the coffee filling over the chilled crust and spread it evenly. Place the cake in the freezer for at least 4 hours, or until firm.
In another bowl, whip 1 cup (200 ml) heavy cream with 2 tablespoons powdered sugar until stiff peaks form.
Remove the cake from the freezer and carefully take it out of the pan. Pipe or spread the whipped cream over the top, then return the cake to the freezer for about 30 minutes so the topping can set.
Let the cake sit at room temperature for a few minutes before slicing so it cuts cleanly.
Notes
Press the Crust Firmly: I like to press the cookie base down really well so it holds together neatly once the cake is frozen and sliced.Whip the Cream Properly: The filling stays lighter and sets better when I whip the cream all the way to stiff peaks before folding in the dulce de leche.Rest Before Slicing: I usually leave the cake out for 5–10 minutes before cutting so the slices come out cleaner, and the texture is a little easier to enjoy.