BROWNIES- In a large bowl, combine flour, sugar, cocoa powder, and salt. Add eggs, oil and milk, beat until smooth. Pour into a well greased 15x10-inch jelly roll pan. Bake at 350 for about 20-25 minutes. Cool completely.
MINT CREME- Beat till smooth and spread evenly over brownies. Chill for a few minutes to set.
CHOCOLATE GLAZE- Melt butter in glass bowl in microwave. Add chips and cook at 50% power, stirring every 30 seconds, until melted and smooth. Drizzle or spread over mint layer. Chill for 1 hour.