Ingredients
Hot fudge sauce
Method
1.Line base and sides of 8cm x 26cm bar cake pan with baking paper. Spoon ice-cream into medium bowl, stand 10 minutes to soften slightly. Press ice-cream into pan, cover with foil; freeze overnight.
2.Preheat oven to 180°C (160°C fan-forced). Line base and sides of another 8cm x 26cm bar cake pan with baking paper.
3.Stir butter and chocolate in small saucepan over low heat until mixture is smooth. Transfer mixture to medium bowl. Stir in sugar; cool.
4.Stir egg then flour, sour cream and nuts into chocolate mixture. Spread mixture into pan.
5.Bake brownie, uncovered, about 40 minutes. Cool in pan. Turn onto wire rack; remove lining paper. Trim narrow ends; cut into 12 slices.
6.Meanwhile, make hot fudge sauce. Stir ingredients in small saucepan over low heat until mixture is smooth; bring to the boil. Reduce heat; simmer, uncovered, 2 minutes.
7.Turn ice-cream out of pan; cut into eight slices. Stack alternate slices of ice-cream and brownie, starting and finishing with brownie. Drizzle each stack with hot fudge sauce.