diff --git a/src/material/_index.scss b/src/material/_index.scss
index 7b7680990015..886aa472fb1f 100644
--- a/src/material/_index.scss
+++ b/src/material/_index.scss
@@ -88,7 +88,7 @@
 @forward './button/button-theme' as button-* show button-theme, button-color, button-typography,
   button-density;
 @forward './button/fab-theme' as fab-* show fab-color, fab-typography,
-  fab-density, fab-theme;
+  fab-density, fab-theme, fab-base;
 @forward './button/icon-button-theme' as icon-button-* show icon-button-color,
   icon-button-typography, icon-button-density, icon-button-theme;
 @forward './button-toggle/button-toggle-theme' as button-toggle-* show button-toggle-theme,
diff --git a/src/material/button/_fab-theme.scss b/src/material/button/_fab-theme.scss
index 9b359f0f7f36..2865653cf25a 100644
--- a/src/material/button/_fab-theme.scss
+++ b/src/material/button/_fab-theme.scss
@@ -5,11 +5,22 @@
 
 @use './button-theme-private';
 @use '../core/mdc-helpers/mdc-helpers';
+@use '../core/style/sass-utils';
 @use '../core/theming/theming';
 @use '../core/tokens/m2/mdc/fab' as tokens-mdc-fab;
 @use '../core/tokens/m2/mdc/extended-fab' as tokens-mdc-extended-fab;
 @use '../core/typography/typography';
 
+@mixin base($config-or-theme) {
+  // Add default values for tokens not related to color, typography, or density.
+  @include sass-utils.current-selector-or-root() {
+    @include mdc-fab-theme.theme(tokens-mdc-fab.get-unthemable-tokens());
+    @include mdc-extended-fab-theme.theme(
+      tokens-mdc-extended-fab.get-unthemable-tokens()
+    );
+  }
+}
+
 @mixin _fab-variant($config, $foreground, $background) {
   $color-config: map.merge(
     $config,
@@ -105,6 +116,7 @@
     $density: theming.get-density-config($theme);
     $typography: theming.get-typography-config($theme);
 
+    @include base($theme);
     @if $color != null {
       @include color($color);
     }
diff --git a/src/material/button/fab.scss b/src/material/button/fab.scss
index 2e279323991f..581cb7bcb32e 100644
--- a/src/material/button/fab.scss
+++ b/src/material/button/fab.scss
@@ -22,17 +22,11 @@
   .mat-mdc-fab, .mat-mdc-mini-fab {
     // Add the official slots for the MDC fab.
     @include mdc-fab-theme.theme-styles($mdc-fab-token-slots);
-
-    // Add default values for tokens that aren't outputted by the theming API.
-    @include mdc-fab-theme.theme(m2-mdc-fab.get-unthemable-tokens());
   }
 
   .mat-mdc-extended-fab {
     // Add the official slots for the MDC fab.
     @include mdc-extended-fab-theme.theme-styles($mdc-extended-fab-token-slots);
-
-    // Add default values for tokens that aren't outputted by the theming API.
-    @include mdc-extended-fab-theme.theme(m2-mdc-extended-fab.get-unthemable-tokens());
   }
 }