Line the bottom of a 7 - 9 inch springform or normal baking pan with parchment paper.
Melt salted butter in a saucepan.
Remove from heat and add unsweetened cocoa powder, granulated sugar, eggs, vanilla extract, flour and combine thoroughly but do not over-mix.
Bake in a 180 C preheated oven for 20 - 30 mins. The timing depends on the size of the pan you are using. It took me 25 mins in an 8-inch pan. It should be set around the edges and still gooey (undercooked) in the middle. If you prefer the center to be more like molten lava, bake the cake a little less approx. 20 - 22 mins.
Let the cake cool in the pan for 20 mins and remove from the pan. If using a normal cake pan ‘gently’ invert onto a wire rack.
Dust with powdered sugar.
Serve warm as is or with a scoop of vanilla ice cream. Enjoy!!!
Notes
You may have to experiment with the baking time according to the size of your pan and preference of how gooey you want your cake to be.
Keyword brownie cake, easy chocolate cake, one pot chocolate cake