Preheat the oven to 325 degrees F. Line the bottom of two 8-inch-square metal baking pans with parchment paper and lightly butter the paper. Sift the flour, baking powder, baking soda and salt into a bowl, then whisk to combine.
Melt the butter in a saucepan over medium heat. Add the cocoa powder and whisk until dissolved, about 1 minute. Transfer to a bowl and whisk in both sugars until combined. Add the coffee, buttermilk, egg and vanilla and whisk until smooth. Whisk in the flour mixture until just combined.
Divide the batter evenly between the prepared pans. Bake until a toothpick inserted into the center comes out with a few moist crumbs, 15 to 20 minutes. Cool slightly in the pans, then invert onto a rack to cool completely. Transfer the cakes to a baking sheet lined with parchment paper, cover with plastic wrap and freeze until firm, about 1 hour.
Remove the ice cream from the freezer to soften, 10 to 20 minutes. Clean and dry the baking pans, then line each with plastic wrap, leaving a 4-inch overhang on all sides. Scoop all of the ice cream into one of the pans, packing it to make an even 1-inch-thick layer; smooth with a small offset spatula or the back of a spoon. Fold the plastic wrap over the ice cream to cover it, then freeze until solid, at least 1 hour.
Put 1 frozen cake in the remaining plastic-lined pan. Unwrap the ice cream layer and invert it on top of the cake; remove the plastic wrap. Cover with the remaining cake, pressing gently. Fold the plastic wrap over the cake to cover it and freeze until firm, about 1 hour.
When ready to serve, unwrap the cake and cut into 9 squares. Cut each square in half to make 2 rectangles or triangles.
Photograph by Levi Brown

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	290.23 Kcal (1215 kJ)
Calories from fat	95.88 Kcal
		% Daily Value*
Total Fat	10.65g	16%
Cholesterol	34.43mg	11%
Sodium	165.9mg	7%
Potassium	240.15mg	5%
Total Carbs	47.29g	16%
Sugars	26.91g	108%
Dietary Fiber	1.24g	5%
Protein	4.92g	10%
Iron	0.8mg	4%
Calcium	100.1mg	10%

Amount Per 100 g
Calories	243.27 Kcal (1019 kJ)
Calories from fat	80.37 Kcal
		% Daily Value*
Total Fat	8.93g	16%
Cholesterol	28.86mg	11%
Sodium	139.06mg	7%
Potassium	201.3mg	5%
Total Carbs	39.64g	16%
Sugars	22.56g	108%
Dietary Fiber	1.04g	5%
Protein	4.12g	10%
Iron	0.6mg	4%
Calcium	83.9mg	10%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.

Tastes

salty
savory
bitter
sweet

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