Chocolate Chunk Coffeecake

Instructions:

Preheat oven to 350ºF. (180ºC.). Grease a 10-inch (25-cm) Bundt or tube pan. Sprinkle lightly with flour. Shake until pan is evenly coated with flour, then shake out excess. In a small bowl, stir sour cream with baking soda. Into a large mixing bowl, measure flour, baking powder and salt. Stir with a fork until evenly blended. Coarsely chop 4 chocolate squares until pieces are about the size of chocolate chips. Using an electric mixer or a wooden spoon, beat butter and sugar until very creamy. Add eggs, one at a time, beating well after each addition. Stir in vanilla. Using a wooden spoon, stir in about a third of the flour mixture just until combined. Then, stir in half of the sour cream mixture just until smooth. Repeat with another third of the flour mixture, then remaining sour cream mixture and the remaining flour mixture. To make chocolate batter, sieve cocoa into a medium-size mixing bowl. Stir in water until a smooth paste forms. Add a third of the white batter. Stir until evenly mixed, then, stir in chocolate chunks. Spoon the remaining white batter into the greased and floured pan. Smooth the top. Then, spoon the chocolate batter on top in 3 large evenly spaced dollops. With a spatula or large knife, gently fold the chocolate batter into the white, being careful to just swirl, not totally stir. Bake in centre of preheated oven until centre of cake springs back when lightly touched or a cake tester inserted into centre of cake comes out without any clinging batter, from 60 to 65 minutes. Cool in pan on a rack. Turn cooled cake out of pan and onto a serving plate upside down. To make ganache icing, coarsely chop 2 chocolate squares. Pour cream into the smallest saucepan you have. Watching closely, place over low heat just until it starts to steam, from 5 to 7 minutes. Or heat in a small dish in the microwave on high from 30 to 45 seconds. Remove from heat and immediately stir in chocolate chunks until smooth. Drizzle over cake, letting some dribble down the sides. Cake will keep well at room temperature for 1 day or can be covered and refrigerated for up to 4 days. Coffee cake freezes well but icing texture may break down in the freezer, so its best to add icing when preparing to serve. Preparation time: 25 minutes Baking time: 1 hour Makes: 16 to 20 slices