Preheat oven to 350°F (175°C) and line a 9×13-inch baking pan with parchment paper.
Whisk melted butter with granulated and brown sugar until smooth.
Beat in eggs one at a time, then stir in vanilla extract.
Sift flour, cocoa powder, and salt into another bowl and fold dry ingredients into wet mixture until just combined.
Stir in chocolate chips, pour batter into prepared pan, and smooth the top.
Bake for 30 to 35 minutes or until a toothpick inserted comes out with moist crumbs.
Cool brownies completely in the pan.
Melt semisweet or milk chocolate chips with coconut oil in short microwave bursts, then spread over cooled brownies.
Divide melted white chocolate into small bowls, tint with pastel food coloring, and drizzle over the chocolate layer.
Top brownies with sprinkles and mini candy eggs before the chocolate sets.
Let the brownies firm up or chill for 20 minutes before slicing.