• Start by preheating the oven to 350 degrees Fahrenheit. This temperature bakes the bars perfectly.
• Next, lightly coat a 9x13 inch pan with nonstick cooking spray. This keeps the treats from sticking so they release easily.
• Cut parchment paper to fully line the bottom of the pan and slightly over the rim. The paper facilitates cleanup and prevents sticking as well.
• In a mixing bowl, beat the butter and sugar with an electric mixer until well blended.
• Add eggs one at a time, mixing after each addition to prevent scrambling. Beat for one minute until uniformly smooth.
• Scrape down the sides of the bowl with a spatula. This ensures everything is evenly combined with no lumps.
• Mix for 20 seconds more to thoroughly blend the elements.With the mixer stopped, incorporate the dry ingredients (flour, baking powder, salt). Run just until a dough forms without over-mixing.
• Use your hands or the spatula to spread the dough evenly over the bottom of the prepared pan. Distributing it uniformly leads to consistent baking.
• If dough clings to fingers, dust lightly with flour to facilitate easy handling without sticking.
• Once the dough is placed, bake as directed until golden brown edges form after about 20 minutes. This thorough baking gives a uniformly finished treat.
• Allow the pan of bars to cool completely in the pan following oven time. This preserves the texture by preventing fractures.
• Lift the whole sheet of cookies from the pan using the overhanging parchment paper. The sheet technique handles the fragile baked goods with care.
• Spread frosting over the bars to add another layer of taste and creaminess.For visual flair, lightly dust with colored sugar or sprinkles.
• To serve, divide the solid cookie sheet into 15 evenly cut portions for manageable pieces. Proper sizing facilitates individual enjoyment

Frosting Recipe

• Blend the butter into the powdered sugar until homogenous.
• Gradually add milk and vanilla extract while mixing. This lightens the frosting into a fluffy consistency.
• If frosting seems thick, stir in additional milk by teaspoons until reaching ideal spreading texture.
• Spread frosting evenly over cooled cookie bars using a spatula. This fully coats them in the sweet topping.