Chocolate Cake

Preheat your oven to 425 °F.
Grease a cake pan with cooking spray.
In a bowl, mix together cocoapowder and flour.
In another bowl, add the eggs,butter and sugar and beat until fluffy.
Add in flour mixture and beatuntil just combined.
Pour the batter into preparedbaking pan.
Bake for about 25-30 minutes.
Remove the cake pan from oven and place onto a wire rack to cool forabout 10 minutes.
Carefully invert the cake onto a wire rack to cool completely beforefrosting.
For frosting:in a smallsaucepan, melt butter over medium heat.
Add milk, sugar, cocoa powderand vanilla extract and bring to a rolling boil, stirring frequently.
Cook for about 1 minute,stirring continuously.
Remove from heat and setaside to cool slightly.
With an electric mixer, beat themilk mixture for about 3 minutes or until the mixture cools and thickened.
Spread frosting over cooledcake evenly.
Cut into desired-sized slices and serve.