If you love sheet cakes you are going to LOVE this one!
Preheat oven to 350°F.
In a large saucepan, bring 1 cup butter and water to a boil. Once butter is melted and there is a low rolling boil, remove from heat.
IN THIS ORDER: Stir in flour, sugar, sour cream, 1 teaspoon almond extract, salt, baking soda, and eggs. Whisk after each addition until smooth.
Pour batter into a prepared 10x15-inch baking pan.
Bake in the preheated oven for 20 to 22 minutes, or until cake is golden brown and an inserted toothpick is removed with a few crumbs. (not wet)
Combine 1/2 cup butter and milk in a saucepan; bring to a low rolling boil, then remove from heat.
Add in sugar 1 cup at a time making sure to whisk after each addition.
Add in 1/2 teaspoon almond extract. Whisk well. It will be similar to a gravy consistency.
Stir in pecans. Spread frosting over warm cake.