In a large saucepan, bring 1 cup butter and water to a boil. Remove from heat, and stir in flour, sugar, eggs, sour cream, 1 teaspoon almond extract, salt, and baking soda until smooth. Pour batter into a greased 10x15-inch baking pan.
Bake in the preheated oven for 20 to 22 minutes, or until cake is golden brown and tests done. Cool for 20 minutes.
Combine 1/2 cup butter and milk in a saucepan; bring to a boil. Remove from heat. Mix in sugar, and 1/2 teaspoon almond extract. Stir in pecans. Spread frosting over warm cake.