diff --git a/Formula/cascadia.rb b/Formula/cascadia.rb
new file mode 100644
index 00000000000..d1b20f26bae
--- /dev/null
+++ b/Formula/cascadia.rb
@@ -0,0 +1,29 @@
+class Cascadia < Formula
+  desc "Go cascadia package command-line CSS selector"
+  homepage "https://github.com/suntong/cascadia"
+  url "https://github.com/suntong/cascadia/archive/refs/tags/v1.2.7.tar.gz"
+  sha256 "ff314144fdab70a7347b0c1a27b5e6628abe72827947e3cb571cebd385fd61df"
+  license "MIT"
+  head "https://github.com/suntong/cascadia.git", branch: "master"
+
+  bottle do
+    root_url "https://github.com/gromgit/homebrew-core-mojave/releases/download/cascadia"
+    sha256 cellar: :any_skip_relocation, mojave: "39f39f9d63779b7815d38fa8b2a1988dac97034a84bd4ab2f19fd3b0340ce2d7"
+  end
+
+  depends_on "go" => :build
+
+  def install
+    system "go", "build", *std_go_args(ldflags: "-s -w")
+  end
+
+  test do
+    assert_match "Version #{version}", shell_output("#{bin}/cascadia --help")
+
+    test_html = "<foo><bar>aaa</bar><baz>bbb</baz></foo>"
+    test_css_selector = "foo > bar"
+    expected_html_output = "<bar>aaa</bar>"
+    assert_equal expected_html_output,
+      pipe_output("#{bin}/cascadia --in --out --css '#{test_css_selector}'", test_html).strip
+  end
+end