diff --git a/src/build.rs b/src/build.rs
index 2be1baa..b6121ad 100644
--- a/src/build.rs
+++ b/src/build.rs
@@ -12,6 +12,7 @@ use slog::{Drain, FnValue, Logger};
 use slog_async::Async;
 #[cfg(feature = "slog-kvfilter")]
 use slog_kvfilter::KVFilter;
+use slog_term::Decorator;
 use std::fmt::Debug;
 use std::panic::{RefUnwindSafe, UnwindSafe};
 
@@ -21,6 +22,19 @@ pub trait Build {
     fn build(&self) -> Result<Logger>;
 }
 
+/// This trait allows to build a logger instance with a custom format (i.e., [`Drain`]}.
+pub trait BuildWithCustomFormat {
+    /// [`Decorator`] type generated by the logger builder.
+    type Decorator: Decorator;
+
+    /// Builds a logger with a custom format.
+    fn build_with_custom_format<F, D>(&self, f: F) -> Result<Logger>
+    where
+        F: FnOnce(Self::Decorator) -> Result<D>,
+        D: Drain + Send + 'static,
+        D::Err: Debug;
+}
+
 /// Logger builder.
 #[derive(Debug)]
 #[allow(clippy::large_enum_variant)]
diff --git a/src/file.rs b/src/file.rs
index f2f8b32..482a5d3 100644
--- a/src/file.rs
+++ b/src/file.rs
@@ -1,16 +1,16 @@
 //! File logger.
 use crate::build::BuilderCommon;
-use crate::misc;
 use crate::permissions::restrict_file_permissions;
 #[cfg(feature = "slog-kvfilter")]
 use crate::types::KVFilterParameters;
 use crate::types::{Format, OverflowStrategy, Severity, SourceLocation, TimeZone};
+use crate::{misc, BuildWithCustomFormat};
 use crate::{Build, Config, ErrorKind, Result};
 use chrono::{DateTime, Local, TimeZone as ChronoTimeZone, Utc};
 #[cfg(feature = "libflate")]
 use libflate::gzip::Encoder as GzipEncoder;
 use serde::{Deserialize, Serialize};
-use slog::Logger;
+use slog::{Drain, Logger};
 use slog_term::{CompactFormat, FullFormat, PlainDecorator};
 use std::fmt::Debug;
 use std::fs::{self, File, OpenOptions};
@@ -178,6 +178,37 @@ impl Build for FileLoggerBuilder {
         Ok(logger)
     }
 }
+impl BuildWithCustomFormat for FileLoggerBuilder {
+    type Decorator = FileLoggerDecorator;
+
+    fn build_with_custom_format<F, D>(&self, f: F) -> Result<Logger>
+    where
+        F: FnOnce(Self::Decorator) -> Result<D>,
+        D: Drain + Send + 'static,
+        D::Err: Debug,
+    {
+        let decorator = FileLoggerDecorator(PlainDecorator::new(self.appender.clone()));
+        let drain = track!(f(decorator))?;
+        Ok(self.common.build_with_drain(drain))
+    }
+}
+
+/// [`slog_term::Decorator`] implementation for [`FileLoggerBuilder`].
+pub struct FileLoggerDecorator(PlainDecorator<FileAppender>);
+
+impl slog_term::Decorator for FileLoggerDecorator {
+    fn with_record<F>(
+        &self,
+        record: &slog::Record,
+        logger_values: &slog::OwnedKVList,
+        f: F,
+    ) -> io::Result<()>
+    where
+        F: FnOnce(&mut dyn slog_term::RecordDecorator) -> io::Result<()>,
+    {
+        self.0.with_record(record, logger_values, f)
+    }
+}
 
 #[derive(Debug)]
 struct FileAppender {
diff --git a/src/lib.rs b/src/lib.rs
index b5ff470..4244f6c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -48,7 +48,7 @@ extern crate slog;
 #[macro_use]
 extern crate trackable;
 
-pub use build::{Build, LoggerBuilder};
+pub use build::{Build, BuildWithCustomFormat, LoggerBuilder};
 pub use config::{Config, LoggerConfig};
 pub use error::{Error, ErrorKind};
 pub use misc::set_stdlog_logger;
diff --git a/src/terminal.rs b/src/terminal.rs
index c685fc7..73a79dc 100644
--- a/src/terminal.rs
+++ b/src/terminal.rs
@@ -1,12 +1,12 @@
 //! Terminal logger.
 use crate::build::BuilderCommon;
-use crate::misc;
 #[cfg(feature = "slog-kvfilter")]
 use crate::types::KVFilterParameters;
 use crate::types::{Format, OverflowStrategy, Severity, SourceLocation, TimeZone};
+use crate::{misc, BuildWithCustomFormat};
 use crate::{Build, Config, Result};
 use serde::{Deserialize, Serialize};
-use slog::Logger;
+use slog::{Drain, Logger};
 use slog_term::{self, CompactFormat, FullFormat, PlainDecorator, TermDecorator};
 use std::fmt::Debug;
 use std::io;
@@ -120,6 +120,37 @@ impl Build for TerminalLoggerBuilder {
         Ok(logger)
     }
 }
+impl BuildWithCustomFormat for TerminalLoggerBuilder {
+    type Decorator = TerminalLoggerDecorator;
+
+    fn build_with_custom_format<F, D>(&self, f: F) -> Result<Logger>
+    where
+        F: FnOnce(Self::Decorator) -> Result<D>,
+        D: Drain + Send + 'static,
+        D::Err: Debug,
+    {
+        let decorator = TerminalLoggerDecorator(self.destination.to_decorator());
+        let drain = track!(f(decorator))?;
+        Ok(self.common.build_with_drain(drain))
+    }
+}
+
+/// [`slog_term::Decorator`] implementation for [`TerminalLoggerBuilder`].
+pub struct TerminalLoggerDecorator(Decorator);
+
+impl slog_term::Decorator for TerminalLoggerDecorator {
+    fn with_record<F>(
+        &self,
+        record: &slog::Record,
+        logger_values: &slog::OwnedKVList,
+        f: F,
+    ) -> io::Result<()>
+    where
+        F: FnOnce(&mut dyn slog_term::RecordDecorator) -> io::Result<()>,
+    {
+        self.0.with_record(record, logger_values, f)
+    }
+}
 
 /// The destination to which log records will be outputted.
 ///