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1
Prepare chocolate mixture by placing chocolate in a small pan and adding hot water.
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2
Bring to a boil, stirring constantly.
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3
Add baking soda and mix-- mixture will foam.
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4
Cool mixture to lukewarm.
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5
Meanwhile, cream together butter and sugar until fluffy.
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6
Add eggs one at a time and beat well after each addition.
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7
Add vanilla and the cooled chocolate mixture.
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8
Add nuts, flour, salt and sourdough starter.
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9
Mix well and pour batter into a greased and floured 9x13 inch baking pan.
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10
Let set in a warm place for 30 minutes.
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11
Preheat oven to 350 degrees F.
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12
Bake 35 to 40 minutes, or until a pick comes out clean.
