Preheat oven to 350º F and delicately oil 2 round cake compartment, dependent upon needed thickness of cake.In a medium bowl, whisk together flour, baking powder and salt.In a colossal bowl or blender, beat sugar and shortening together for 2-3 minutes, or until smooth and padded.Beat in eggs and vanilla concentrate until merged, then, mix in milk and dry trimmings, being careful so as not to over-mix.Void cakes into lubed baking rounds and spot in grill.Plan for 30 minutes, or until a toothpick installed in the center comes clean. Dispense with from oven and let cool completely.Join gritty shaded sugar, sugar, margarine and solidified milk in a colossal skillet over medium-high hotness, blending reliably until thickened.Intensity with the eventual result of bubbling, then lower hotness and blend in vanilla extra and sea salt. Cook for 5-7 minutes, or until thickened. Let cool fairly until warm and thickened, then, gather base cake layer and pour 2/3-3/4 cup icing over.Top with an ensuing cake layer and pour frosting over the most noteworthy reason behind the cake, permitting it to cover the sides. (On account of using three layers, segment icing appropriately).